What Are the Breast Implant Illness Symptoms?
Some women with breast implants report experiencing a collection of unexplained health problems, including fatigue, brain fog, joint pain and hair loss. These reported systemic symptoms are commonly referred to as breast implant illness (BII).
If you have breast implants and have started feeling unwell, you may be looking for a breast implant illness symptoms list to understand whether your experiences are similar to those reported by other women. Alternatively, you may already suspect implant illness and want to know what symptoms to discuss with your GP or surgeon.
Breast implant illness is not currently an official medical diagnosis, and there is no single diagnostic test for it. Current UK Government guidance on symptoms sometimes referred to as breast implant illness says it is not yet known whether there is a link between breast implants and the health problems grouped under the term BII.
This guide explains the most commonly reported BII symptoms, when symptoms can start, how they may be investigated and what to consider if you are thinking about implant removal.
What are the symptoms of breast implant illness?
The symptoms of breast implant illness vary considerably. Because the term describes symptoms affecting many different parts of the body, two women reporting breast implant illness may have very different experiences.
Commonly reported breast implant illness symptoms include:
- Chronic fatigue and low energy
- Brain fog, memory difficulties or poor concentration
- Joint and muscle pain
- Muscle weakness
- Headaches or dizziness
- Hair loss or thinning
- Rashes and other skin problems
- Dry eyes or dry mouth
- Digestive issues
- Anxiety or depression
- Sleep disturbance
- Unexplained weight changes
- Neurological symptoms such as tingling or numbness
UK Government guidance specifically refers to reported problems including fatigue, brain fog, anxiety and joint pain in people who associate health problems with their breast implants.
These symptoms are not unique to implant illness. Many overlap with other diseases and health conditions, making appropriate medical assessment important.
1. Chronic fatigue and brain fog
Chronic fatigue is one of the most commonly reported BII symptoms. Rather than ordinary tiredness, some women describe persistent exhaustion that can affect work, exercise and everyday activities.
Brain fog can involve difficulty concentrating, forgetfulness, reduced mental clarity or problems finding words.
A recent systematic review examining more than 6,000 women across published studies found fatigue among the most commonly reported symptoms of breast implant illness.
However, fatigue and cognitive difficulties can also have other causes. A healthcare provider may therefore investigate issues such as anaemia, thyroid conditions, nutritional deficiencies or other medical conditions.
2. Joint pain, muscle pain and weakness
Joint pain and muscle pain are also frequently reported by women who describe experiencing breast implant illness.
Symptoms may include aching joints, stiffness, widespread muscular discomfort or muscle weakness. The same systematic review identified joint pain and muscle pain among the more commonly reported symptoms in patients included in BII research.
Because joint and muscle pain can also occur with autoimmune diseases and many other conditions, these symptoms alone cannot be used to diagnose breast implant illness.
3. Hair loss, rashes and skin changes
Some women reporting implant illness describe hair loss, thinning or increased shedding.
Rashes, itching and other skin problems are also reported. There is no single recognised breast implant illness rash, meaning it cannot be identified solely by its appearance.
Hair loss and skin changes can have many possible explanations, including hormonal changes, allergies, nutritional deficiencies and other health conditions. Persistent changes should therefore be discussed with a healthcare provider rather than assumed to result from breast implants.
4. Neurological and eye symptoms
Reported breast implant illness neurological symptoms can include headaches, dizziness, numbness, tingling or changes in sensation.
Some women also describe dry or irritated eyes, visual discomfort or dry mouth. These symptoms can be similar to those experienced with some autoimmune conditions and neurological disorders.
New, persistent or worsening neurological or visual symptoms should be medically assessed to establish whether another condition requires treatment.
5. Digestive issues and weight changes
Some women reporting breast implant illness describe digestive issues, including bloating, changes in digestion or altered bowel habits.
Unexplained weight changes have also been reported, including both weight gain and weight loss.
Neither digestive symptoms nor unexplained weight change is specific to BII. Your GP may therefore consider gastrointestinal, hormonal, metabolic or nutritional explanations when investigating your symptoms.
6. Anxiety, depression and sleep problems
Women reporting breast implant illness may also describe anxiety, depression or difficulty sleeping.
These symptoms can occur alongside chronic fatigue, pain and difficulties concentrating, and can have a significant effect on a person's wellbeing.
Whatever their underlying cause, persistent anxiety, depression or disrupted sleep should be taken seriously and discussed with an appropriate healthcare professional.
Can breast implants cause autoimmune problems?
Some BII symptoms, including fatigue, rashes, dry eyes and joint and muscle pain, resemble symptoms found in certain autoimmune diseases.
However, breast implant illness should not simply be described as an autoimmune disease. Current evidence has not established a single mechanism explaining the full range of reported symptoms.
Researchers continue to examine possible explanations involving the immune system, chronic inflammation, microbial biofilm and responses to materials used in breast implants. Recent systematic reviews show that the evidence remains complex and that further research is required.
What causes breast implant illness?
The exact cause of breast implant illness is not established. Research is ongoing, but faces significant challenges due to the difficulties in conclusively identifying who has the condition.
Several possibilities have been investigated, including inflammatory responses, bacterial biofilm, silicone exposure and immune responses to an implanted medical device. Heavy metals associated with breast implant materials have also been studied, although current research does not establish heavy-metal exposure as a proven universal cause of BII.
Because women report systemic symptoms with different implant histories and presentations, there may not be one explanation that accounts for every person's experience.
When can breast implant illness symptoms start?
There is no set timeframe for BII symptoms to begin.
Women have reported symptoms developing after cosmetic breast augmentation and breast reconstruction, sometimes months or years after breast implant surgery. Research has found considerable variation in the time between implantation and the onset of reported systemic symptoms.
The timing of symptoms does not by itself establish that breast implants caused them. Persistent unexplained symptoms should therefore be medically investigated.
How is breast implant illness diagnosed?
There is currently no single test that can diagnose breast implant illness and no universally accepted diagnostic criteria. Diagnosis usually involves ruling out other medical conditions first.
Your healthcare provider may:
- Discuss your symptoms and when they started
- Review your medical and breast surgery history
- Consider your implant history
- Carry out a physical examination
- Order tests where appropriate
- Investigate other possible medical conditions
UK Government guidance advises people experiencing symptoms they associate with their breast implants to speak to their GP or surgeon.
Because BII symptoms can overlap with autoimmune conditions, thyroid disorders, nutritional deficiencies, chronic fatigue and other diseases, diagnosis often involves investigating alternative explanations.
Do breast implant illness symptoms improve after implant removal?
Some women report that their symptoms improve after having their implants removed, although improvement cannot be guaranteed.
A 2025 systematic review and meta-analysis found that a majority of patients included in published studies reported improvement following explantation, while another systematic review of breast implant illness as a clinical entity also found substantial reported symptom improvement after removal.
If you are considering breast implant removal, speak to an appropriately qualified plastic surgeon. Explant surgery involves removing the implants and, depending on the circumstances, may also involve removing some of the surrounding scar tissue.
Having breast implants removed is still surgery and involves its own risks. The appropriate BII treatment therefore depends on your symptoms, health, implant history and individual circumstances. The NHS breast enlargement guidance also explains that some women may need further surgery if they develop problems with implants or if the breasts change around them.
What should I do if I think my breast implants are making me unwell?
If you are experiencing symptoms that concern you, make an appointment with your GP or another appropriate healthcare provider.
It may help to record your symptoms, when they began, how frequently they occur and whether their severity changes. You should also provide details of when your implants were inserted and any subsequent breast surgery.
If you develop a change affecting the breast itself, such as persistent breast pain, a new lump, swelling or a significant change around an implant, seek medical advice. UK guidance advises people experiencing changes to their breasts or problems with an implant to speak to their GP or implanting surgeon. GOV.UK guidance on breast implants and anaplastic large cell lymphoma also advises people who develop a problem with a breast implant to speak to their surgeon and GP.
For many women, removing implants may improve symptoms, although outcomes can vary. During explant surgery, plastic surgeons may also remove surrounding scar tissue where this is clinically appropriate.
How can Cosmetic Surgery Solicitors help?
Experiencing breast implant illness symptoms does not itself mean negligent treatment has occurred. You may, however, have separate concerns about the care you received during breast implant surgery, breast implant removal or revision treatment.
Cosmetic Surgery Solicitors specialises in cosmetic and breast surgery negligence claims and has more than 20 years of experience acting for people who believe their cosmetic treatment fell below the standard they should have received.
Our specialist solicitors can review your treatment, obtain relevant medical records and arrange independent medical evidence where appropriate. Claims can also be handled on a no win, no fee basis.
If you are concerned about the standard of care you received during breast surgery or revision treatment, call Cosmetic Surgery Solicitors on 0161 877 1066 or complete our . You can also find out more about our breast implant revision claims service.
You may also find our guides on capsular contracture after breast implants and early signs of capsular contracture helpful if your concerns involve implant firmness, distortion, discomfort or changes in breast shape.
