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Unexplained physical symptoms

Normal test results don’t mean nothing is wrong. Your symptoms are real, you deserve to be taken seriously, and there is a lot that can help.

⏱ 5 min read📑 11 sections📚 11 sources✅ Reviewed October 2026

By the numbers

How common unexplained symptoms are, from trusted sources.

Symptoms that tests don’t fully explain are among the most common reasons people see a doctor. Different studies count in different ways, so numbers vary.

How common

1 in 4people who see their family doctor have physical symptoms that are not fully explained by a physical illness (Royal College of Psychiatrists).
1 in 3+people seen in neurology outpatient clinics have such symptoms (Royal College of Psychiatrists).
35–70%of people have a functional gut problem at some point in life (Harvard Health).

Who & when

By 30Somatic symptom disorder usually begins by age 30, and can affect children, teens and adults (Cleveland Clinic).
Early adulthoodis when illness anxiety (severe health worry) typically first appears (Cleveland Clinic).
More womenFunctional gut problems affect women more often than men (Harvard Health).

Getting better

Mostpeople with body symptoms not due to physical illness are helped by understanding how their symptoms are caused and what they can do (Royal College of Psychiatrists).
1 yearOne study cited by Cleveland Clinic found CBT reduced somatic symptoms within a year.

What are unexplained symptoms?

Real symptoms that tests don’t fully explain. Tap any card.

Sometimes people have physical symptoms, like pain, tiredness or dizziness, and tests don’t find a clear physical illness to explain them. Doctors sometimes call these “medically unexplained” or “functional” symptoms.

They are very common. About 1 in 4 people who see their family doctor have symptoms like this. They are real, they can be very disabling, and they are not imagined.

🩻 Common symptomsPain, tiredness, dizziness, chest or stomach symptoms.
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Often reported

  • Back pain
  • Chest pain or a pounding heart
  • Feeling faint
  • Headaches
  • Muscle or joint pain
  • Stomach problems
  • Tiredness

Less common

  • Breathlessness
  • Collapsing or seizure-like attacks
  • Numbness or tingling
  • Weakness
Any of these can also be caused by a medical illness. New or changing symptoms always need a check by your clinical provider.
🏷️ Patterns with namesSome symptom patterns are common enough to have their own name.
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When many people share a similar pattern, it may be given a name. Irritable bowel syndrome (troubling stomach symptoms) and fibromyalgia (widespread pain and tenderness) are examples.

Seizure-like attacks with normal brain electrical activity, and other functional symptoms like weakness or tremor, fall under functional neurological disorder. See the Functional neurological disorder (FND) guide.

💻 A “software” problemThe body’s parts can be healthy while the system works differently.
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The Royal College of Psychiatrists explains that pain can continue even when nerves are intact, because the “software” of the nervous system isn’t working properly.

Think of a computer: the hardware can be fine while the software has a glitch. That is why standard scans and blood tests can come back normal.

“Unexplained” doesn’t mean “made up”. It means the cause isn’t damage that standard tests can see.

Why they happen

Body, mind and life all play a part. Tap any card.

There is rarely one single cause. Doctors often describe a mix of biological, psychological and social factors, the same as for many other illnesses.

🔗 Mind and body work togetherThoughts, feelings and stress change the body, and the body changes how we feel.
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Stress triggers the “fight or flight” response. When stress goes on, the body can stay in that state, and the symptoms it causes can feed worry, which makes them worse.

The When the body speaks guide explains the stress response and the worry–symptom loop in detail.
🔍 Attention turns the volume upFocusing on a symptom can make it feel stronger.
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Our brains decide which body signals to notice. Worry about a symptom turns up its volume, so it feels more intense. The symptom is real, and the worry amplifies it.

🌧️ Hidden anxiety or low moodPeople often notice the body symptoms first.
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Anxiety and depression can both cause physical symptoms. People often notice the body symptoms before they recognise the mood problem.

Anxiety itself can cause headaches and a racing heart, which can be mistaken for signs of illness.

🤒 After illness or injurySymptoms can begin after an infection, a migraine or an injury.
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For some people, functional symptoms begin after an infection, a migraine or a physical injury. The nervous system can get stuck in a pattern after a shock to the body.

🕰️ Past experiencesHard experiences can raise the risk, but aren’t always there.
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Cleveland Clinic lists anxiety and depression, childhood neglect, physical and sexual abuse, other trauma, and a tendency to expect the worst as risk factors for somatic symptom disorder.

Many people have none of these. If you do, it isn’t your fault, and it can be worked through. See the Healing from trauma guide.

🔬 Too many testsMore tests aren’t always more helpful.
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The Royal College of Psychiatrists notes that tests that aren’t needed can make someone worry even more, and that symptoms can last longer with many medical investigations or long-term stress.

Your doctor can talk with you about which tests are really useful for you.

When symptoms take over

Real physical symptoms where the worry about them takes over life.

Some people have physical symptoms, such as pain, tiredness or shortness of breath, that cause a great deal of distress. The worry, time and energy spent on the symptoms start to take over daily life. Professionals call this somatic symptom disorder (“soma” means body).

The symptoms may or may not have a known medical cause. Either way, they are real. The brain may simply be more sensitive than usual to body sensations and how it reacts to them. It is not “all in your head”.

It can look like

  • Constantly worrying that symptoms mean something serious
  • Feeling anxious or low about your health
  • Finding it hard to do everyday things because of the symptoms and worry
  • Not feeling reassured, even when tests come back normal
  • Seeing many doctors for more tests
  • Spending a lot of time and energy on health concerns
Having some of these experiences doesn’t mean you have a somatic symptom condition. Most people worry about their health sometimes, and new symptoms always deserve a check-up. Social media videos that list “signs you have X” are not a diagnosis. Everyone is unique. People are complex, and only a qualified professional can assess what’s going on for you. Please talk to your clinical provider or therapist.

It can affect children, teens and adults, and usually begins by age 30. Without support, it tends to last a long time, coming and going over months or years, and can make work, home life and wellbeing harder.

The good news: the goal of treatment is learning to cope with symptoms and get back to life, and that is very possible. Cleveland Clinic advises getting help as soon as you start to feel overwhelmed.

Health anxiety

When worry about being ill takes over. Tap any card.

Health anxiety is when you spend so much time worrying that you are ill, or will become ill, that it takes over your life. A tricky part is that anxiety itself causes headaches and a racing heart, which can be mistaken for signs of illness.

🔁 Habits that keep it goingChecking, searching and asking for reassurance.
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  • Asking others again and again for reassurance
  • Avoiding anything about illness, or avoiding exercise “just in case”
  • Checking your body often for lumps, tingling or pain
  • Doubting doctors or tests have caught everything
  • Searching symptoms online for hours

These habits bring a little relief, but they keep the worry alive. Reassurance often doesn’t last long, and the worry quickly comes back.

⚖️ Health anxiety vs. somatic symptomsSimilar worry, different focus.
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Both involve a lot of health worry. Cleveland Clinic explains that in somatic symptom disorder, a person has real physical symptoms that take over. In illness anxiety, the main problem is a persistent fear of having or getting a serious illness.

Some people with illness anxiety also have a real diagnosed illness, and may feel it is worse than it is.

🪜 Small steps that helpCut back slowly, and get back to life.
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  • Return to activities you’ve been avoiding
  • Slowly cut back on checking and searching
  • Write down more balanced thoughts
  • When the urge to check comes, do something absorbing instead
Try the “Cutting back on checking” and “Worry or balanced thought?” worksheets.
🌤️ The outlookIt can be ongoing, and it can be kept in check.
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Severe health worry typically first appears in early adulthood and can be long-lasting, with symptoms that ease and return. Cleveland Clinic says there are steps you can take to keep it in check.

Cognitive behavioural therapy (CBT) helps people talk through their fears and learn healthy ways to cope. Support from loved ones and professionals helps too.

The Kinds of anxiety guide shows how health anxiety relates to other types of anxiety.

Myths and facts

Clearing up common misunderstandings. Tap any card.

🙄 Myth: “It’s all in your head”Fact: The symptoms are real, physical and not chosen.
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Symptoms linked to stress and somatic symptoms are real. They involve the brain and body working differently, not imagination.

Asking whether symptoms are “in the mind” or “in the body” is the wrong question. The brain and mind are both involved, as they are in every illness.

🧪 Myth: “Normal tests mean nothing is wrong”Fact: Some real problems don’t show on standard tests.
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When the problem is in how the body’s systems are working, rather than damage, standard tests are often normal.

Normal results can be good news. They can also be the start of finding the right explanation.

🔬 Myth: “More tests will find it”Fact: Tests that aren’t needed can add worry.
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Tests are important when they are needed. But extra tests can make someone worry even more, and many investigations can keep symptoms going longer.

🧠 Myth: “Therapy means they think I’m making it up”Fact: Therapy helps with real symptoms.
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Talking therapy is offered because it works for real symptoms. It helps people cope, stay active and break the worry–symptom loop.

🚫 Myth: “Nothing can be done”Fact: These problems are treatable, and many people improve.
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CBT can reduce somatic symptoms. Most people are helped by understanding how their symptoms are caused and what they can do to help themselves.

Being taken seriously

Facing stigma, and the power of feeling heard.

One of the hardest parts of living with symptoms that don’t show on tests is not being believed. Many people say they have felt dismissed or blamed, or been told their symptoms are “made up”.

Some people have “fallen through the gaps” because some health workers have had little training in these symptoms. Attitudes are improving, and kind, clear language helps people feel safe to get the care they need.

If you don’t feel believed

  • Ask for an explanation of what the doctor thinks is going on
  • Ask whether a specialist with experience in your symptoms can see you
  • Bring a trusted person to appointments for support
  • Remember: your symptoms are real, whatever the test results say
  • Share reliable information, like this guide, with family and friends
You deserve to be heard and treated with respect. Feeling believed is not a luxury. It is part of getting better.

Working with your doctors

Tips to get the most from appointments.

Having one trusted primary care provider who knows your story can make a big difference, especially alongside a mental health professional. It can reduce the stress of retelling everything to new people and lead to more joined-up care.

Before and during an appointment

  1. Write down your main symptoms, when they started and what makes them better or worse
  2. Note how they affect your daily life: work, school, sleep, family
  3. Bring a list of questions, and put the most important first
  4. Ask: “What do you think is causing this?” and “What can I do to help myself?”
  5. Ask which tests are really needed, and what the results would change
  6. Ask about a plan: who to contact, and when to come back

Your doctor may suggest seeing a psychologist or psychiatrist with experience in body symptoms. They will look at both your symptoms and your life in general. This is not a sign your doctor thinks the symptoms aren’t real.

It’s also okay to say how you feel emotionally. Anxiety and low mood are common when living with symptoms, and they are treatable too.

The “Appointment notes” worksheet can help you prepare. You can share or save it as text.

What helps

Therapies and everyday steps with good support. Tap any card.

Most people are helped by understanding how their symptoms are caused and what they can do to help themselves. There is much that can be done to live a better life. For anything medical, please consult your clinical provider.

🧠 Cognitive behavioural therapy (CBT)The main talking therapy for somatic symptoms.
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CBT helps people look at their beliefs about symptoms, lower stress, focus less on symptoms, stay active and social, and get back to daily life.

It helps people recognise and tackle unhelpful thoughts that keep the worry–symptom loop going.

💬 Other talking therapiesPsychodynamic and problem-solving therapies.
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The Royal College of Psychiatrists also describes psychodynamic therapy, which looks at how feelings and past experiences connect with symptoms, and problem-solving or solution-focused therapy.

Exploring the past only happens when it is useful, and after the therapist has got to know you.

🚶 Gradual activityBuilding up slowly, even with symptoms.
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Gradual exercise is one of the self-help steps the Royal College of Psychiatrists suggests. Staying active and social, even with pain or other symptoms, is a key goal of CBT.

Start small, keep it steady, and build up slowly.

🌿 Everyday self-helpSleep, food, relaxation and tackling other stresses.
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  • Cut down on smoking and alcohol
  • Eat healthily
  • Keep a regular sleep routine
  • Practise relaxation
  • Tackle other stresses where you can
The When the body speaks guide has more ways to calm your body day to day.
🛑 Cutting back on reassuranceLess checking, less searching, less asking.
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Reassurance often doesn’t last long and the worry quickly comes back. Slowly reducing checking, searching and asking helps the worry fade over time.

How to support someone

How to help when someone you love has symptoms doctors can’t easily explain.

Watching someone struggle with symptoms that doctors can’t easily explain is hard. Your belief and steady support can make a real difference to their recovery.

What can help

  • Believe them. Their symptoms are real, even if tests are normal
  • Celebrate small steps forward, and be patient with setbacks
  • Encourage them to stay active and connected, at their own pace
  • Help with practical things, like getting to appointments
  • Learn about their symptoms, so you understand what they’re facing

Things to avoid saying

  • “It’s all in your head”
  • “Just stop worrying about it”
  • “You look fine to me”
  • “You’re doing it for attention”

If the person has health anxiety, giving reassurance again and again can keep the worry going. Instead, kindly acknowledge their feelings and encourage them to use their coping tools or speak to their provider.

Look after yourself too. Support groups for long-term symptoms, pain or anxiety can help both of you feel less alone. See the Family caregivers guide for ideas.

When and where to get help

Your symptoms deserve care, and so do you.

Always get new, worsening or unusual physical symptoms checked by a doctor. Getting help early, as soon as you start to feel overwhelmed, often leads to better results.

It may be time to reach out if…

  • Physical symptoms are stopping you from living normally
  • You check your body or search symptoms many times a day
  • You feel anxious, low or hopeless about your symptoms
  • You spend a lot of time worrying about your health, even after normal tests

A good first step is your doctor or primary care provider. They can check your symptoms and refer you to specialists or a mental health professional. In the U.S., findtreatment.gov can help you find mental health services nearby.

Sudden weakness, numbness, trouble speaking, severe chest pain or a first seizure are emergencies. Call 911 right away. If you’re in crisis, call or text 988 (U.S.), or text HOME to 741741. Outside the U.S., findahelpline.com lists free helplines in many countries.
This guide is for learning and awareness only. It is not a diagnosis and does not replace care from a professional. Please talk to your clinical provider or therapist.

📝 Worksheets for this guide

Fill these in privately in the app. Your answers stay on your phone.

Appointment notesPrepare for a doctor’s visit so you can say what matters most and leave with clear answers.
Cutting back on checkingChecking, searching and asking for reassurance bring short relief but keep worry going. Track them, then cut back a little at a time.
Worry or balanced thought?Write down a health worry, then look at it from a calmer angle.
🔒 Fill in privately in the Mentally United Wellness App. Free, no ads, no accounts.

Sources

  1. Royal College of Psychiatrists (2015). Medically unexplained symptoms
  2. Cleveland Clinic. Somatic Symptom Disorder
  3. Cleveland Clinic (2024). Illness Anxiety Disorder (Hypochondria)
  4. Cleveland Clinic (2025). Functional Neurological Disorder (Formerly Conversion Disorder)
  5. NHS (UK National Health Service). Health anxiety
  6. Harvard Health Publishing (2019). Stress and the sensitive gut
  7. neurosymptoms.org (Prof Jon Stone). FND is not imagined
  8. neurosymptoms.org (Prof Jon Stone). How has it happened?
  9. neurosymptoms.org (Prof Jon Stone). Psychological Therapy
  10. Dworetzky & Baslet (peer-reviewed) (2025). Functional neurological disorder: Practical management (Neurotherapeutics)
  11. Substance Abuse and Mental Health Services Administration (SAMHSA). FindTreatment.gov

This guide is for education and self-care. It is not a diagnosis or a substitute for professional care. Please talk to a counselor or clinical provider about your health. Reviewed October 2026.

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