Diseases & Health Conditions
Educational information about diseases, symptoms, and related treatments
Crohn’s disease
Crohn's disease is a long-term condition that causes inflammation in the lining of the digestive sys...
Croup
Croup is a childhood illness that affects the windpipe (trachea), the airways leading to the lungs (...
Cystic fibrosis
Cystic fibrosis is an inherited condition in which the lungs and the digestive system can become clo...
Cystitis
Cystitis is a type of urinary tract infection (UTI) that affects the bladder. It's a common problem,...
Deafblindness
Deafblindness is a combination of sight loss and hearing loss. Together they affect a person's abili...
Deep vein thrombosis
Deep vein thrombosis (DVT) means a blood clot has formed inside a vein, most often in the leg. In th...
Degenerative cervical myelopathy
Degenerative cervical myelopathy is a condition that may be relevant to you if a doctor has already...
Dehydration
Dehydration happens when your body loses more fluid than it takes in. If it isn't treated, it can be...
Delirium
Delirium, also called acute confusional state, is when your mental function changes suddenly. It usu...
Dementia
Dementia is an umbrella term for a range of conditions linked to damage to the brain or brain cells...
Dementia with Lewy bodies
Dementia is a broad term for a group of conditions that affect different functions of the brain, inc...
Dental abscess
A dental abscess is a pocket of pus that can form inside a tooth, in the gum, or in the bone that ho...
Depression
Depression is a mental health condition with a range of symptoms that can affect how you think and f...
Dermatitis herpetiformis
Dermatitis herpetiformis, often shortened to DH, is an autoimmune skin condition that can be linked...
Diabetic foot issues
Having diabetes means your feet are more likely to run into problems. This happens because a long st...
Diabetic ketoacidosis (DKA)
Diabetic ketoacidosis (DKA) is a life-threatening condition that can affect people with diabetes.
Diabetic retinopathy
About diabetic retinopathy Stages of diabetic retinopathy Treating diabetic retinopathy Preventing d...
Diarrhoea in adults
Diarrhoea means passing stools that are looser, more watery or more frequent than is normal for you....
Diarrhoea in children and babies
Diarrhoea in children and babies means passing looser, watery or more frequent poo (stools) than is...
Discoid eczema
Discoid eczema, also called discoid dermatitis, is a long-term skin condition that mostly affects ad...
Diverticular disease and diverticulitis
About diverticular disease and diverticulitis Diverticular disease and diverticulitis are two relat...
Dizziness (lightheadedness)
Dizziness (lightheadedness) is a very common symptom. It's usually nothing serious, but it's still w...
Dry mouth
It's normal to have a dry mouth now and then, especially if you're a bit dehydrated or feeling nervo...
Duchenne muscular dystrophy (DMD)
Duchenne muscular dystrophy (DMD) is a condition that wastes away the muscles and causes weakness th...