Continuous, unexplained weight loss

On this page you can find conditions that could be the cause of these symptoms although it is not a complete list of possible conditions.

Please note that if you have these symptoms, they may be unrelated to any of these conditions listed. If you are concerned about your symptoms then you should see a doctor.

Information written and reviewed by Certified Doctors.

Conditions

Bladder Cancer

Bladder cancer is where a growth of abnormal tissue, known as a tumour, develops in the lining of the bladder.


Symptoms of this condition may include:

  • Painless blood in urine
  • Pain when passing urine
  • Passing more urine than usual
  • Urgent desire to pass urine
  • Continuous, unexplained weight loss

More information on Bladder Cancer is available here.

If you are worried about this condition you can try our free AI Symptom Checker here.

Breast Cancer

Breast cancer is the most common type of cancer in the UK.


Symptoms of this condition may include:

  • Lump in breast
  • Nipple discharge
  • Rash on or around nipple
  • Continuous, unexplained weight loss
  • Nipple inversion

More information on Breast Cancer is available here.

If you are worried about this condition you can try our free AI Symptom Checker here.

Crohn's disease

Crohn’s disease is a long-term condition that causes inflammation of the lining of the digestive system.


Symptoms of this condition may include:

  • Diarrhoea
  • Abdominal pain
  • Unusually tired
  • Stomach cramps
  • Change in bowel habit

More information on Crohn's disease is available here.

If you are worried about this condition you can try our free AI Symptom Checker here.

Gluten Intolerance

Coeliac disease is a common digestive condition where the small intestine becomes inflamed and unable to absorb nutrients.


Symptoms of this condition may include:

  • Diarrhoea
  • Bloated stomach
  • Unusually tired
  • Continuous, unexplained weight loss
  • Passing excessive wind

More information on Gluten Intolerance is available here.

If you are worried about this condition you can try our free AI Symptom Checker here.

Lung cancer

Lung cancer is one of the most common and serious types of cancer.


Symptoms of this condition may include:

  • Continuous, unexplained weight loss
  • Cough
  • Shortness of breath
  • Unusually tired
  • Loss of appetite

More information on Lung cancer is available here.

If you are worried about this condition you can try our free AI Symptom Checker here.

Non-Hodgkin's lymphoma

Non-Hodgkin's lymphoma is a cancer of the lymphatic system.


Symptoms of this condition may include:

  • Swollen glands
  • Excessive sweating at night
  • Unusually tired
  • Continuous, unexplained weight loss
  • High temperature

More information on Non-Hodgkin's lymphoma is available here.

If you are worried about this condition you can try our free AI Symptom Checker here.

Overactive Thyroid

An overactive thyroid, also known as hyperthyroidism, is where the thyroid gland produces too much of the thyroid hormones.


Symptoms of this condition may include:

  • Continuous, unexplained weight loss
  • Diarrhoea
  • Feeling irritable
  • Sweating
  • Hyperactive behaviour

More information on Overactive Thyroid is available here.

If you are worried about this condition you can try our free AI Symptom Checker here.

Stomach Cancer

Stomach cancer is when an abnormal groups of cells, known as a tumour, develops inside the stomach.


Symptoms of this condition may include:

  • Bloated stomach
  • Continuous, unexplained weight loss
  • Upper abdominal pain
  • Feeling sick or nausea
  • Burning pain in chest or upper abdomen

More information on Stomach Cancer is available here.

If you are worried about this condition you can try our free AI Symptom Checker here.

TB

Tuberculosis (TB) is a bacterial infection spread through inhaling tiny droplets from the coughs or sneezes of an infected person.


Symptoms of this condition may include:

  • Excessive sweating at night
  • Loss of appetite
  • Unusually tired
  • Cough
  • Continuous, unexplained weight loss

More information on TB is available here.

If you are worried about this condition you can try our free AI Symptom Checker here.

Type 2 diabetes

Diabetes is a lifelong condition that causes a person's blood sugar level to become too high.


Symptoms of this condition may include:

  • Passing more urine than usual
  • Unusually tired
  • Unusually thirsty
  • Continuous, unexplained weight loss
  • Passing urine at night frequently

More information on Type 2 diabetes is available here.

If you are worried about this condition you can try our free AI Symptom Checker here.