Diseases & Health Conditions
Educational information about diseases, symptoms, and related treatments
Thrush
Thrush is a very common yeast infection. It isn't a sexually transmitted infection (STI), so you hav...
Thumb fracture
Your thumb injury may be called a fracture, break or crack. These words all mean the same thing. Wh...
Thyroid cancer
The thyroid is a small gland at the front of your neck, just below your voicebox (the larynx). It be...
Tick bites
Ticks are small, spider-like creatures that feed on the blood of birds and mammals, and that include...
Tinnitus
Tinnitus means hearing sounds that seem to come from inside your body rather than from anything arou...
Tonsillitis
Tonsillitis is an infection that causes inflammation (redness and swelling) of the tonsils. It's com...
Tooth decay
Tooth decay happens when acid made by plaque (a sticky film that builds up on your teeth) starts to...
Toothache
Toothache is pain in and around the teeth and jaws, and it's usually caused by tooth decay. You can...
Tourette’s syndrome
Tourette's syndrome is a condition affecting the brain and nerves. It causes involuntary movements a...
Traction apophysitis of the hip in children and young people
Traction apophysitis is a common cause of hip pain in children and young people. "Traction" means p...
Transient ischaemic attack (TIA)
A transient ischaemic attack, often called a TIA or mini stroke, happens when the blood supply to pa...
Transverse myelitis
Transverse myelitis is a rare condition affecting the nervous system. It happens when the spinal cor...
Trichomonas infection
Trichomonas infection is a sexually transmitted infection (STI) caused by a small parasite. It infec...
Trigeminal neuralgia
Trigeminal neuralgia is a sudden, severe facial pain. People describe it as sharp, shooting, or like...
Trigger thumb or trigger finger in children and young people
Trigger thumb (or trigger finger) happens when a tendon that helps bend the finger or thumb becomes...
Tuberculosis (TB)
Tuberculosis (TB) is a bacterial infection that usually spreads when someone breathes in tiny drople...
Type 1 diabetes
Type 1 diabetes is a lifelong condition that causes your blood glucose (sugar) level to become too h...
Type 2 diabetes
Type 2 diabetes is a common health condition, and it can cause your blood sugar to rise higher than...
Ulcerative colitis
Ulcerative colitis is a long-term condition in which your large bowel, meaning your colon and rectum...
Underactive thyroid
About underactive thyroids Symptoms of an underactive thyroid Causes of an underactive thyroid Diagn...
Urinary incontinence
Urinary incontinence is when urine leaks out by accident. It can happen during exercise, such as run...
Urinary tract infection (UTI)
A urinary tract infection (UTI) is a common infection that can affect the bladder, the kidneys and t...
Urinary tract infection (UTI) in children
Urinary tract infections (UTIs) are common. They can affect the: - bladder - urethra (the tube that...
Vaginal cancer
Vaginal cancer that starts in the vagina itself (called primary vaginal cancer) is rare. Around 250...