Conditions

Tooth decay is often caused by having too much sugary food and drink and not cleaning your teeth and gums regularly. See a dentist as soon as possible if you think you or your child has tooth decay.

Tourette syndrome is a condition that causes you to make sudden, repetitive sounds or movements (tics). There is no cure, but treatment can help manage the tics.

Toxic shock syndrome (TSS) is a rare but life-threatening condition caused by an infection. It can happen when using a tampon or menstrual cup, or from an infected wound. Symptoms develop quickly and you need urgent treatment.

Toxocariasis is an infection caused by small worms found in the poo of some dogs, cats and foxes. It's rare but can sometimes cause serious problems.

Toxoplasmosis is a common infection that you can catch from the poo of infected cats, or infected meat. It's usually harmless but can cause serious problems in some people.

A transient ischaemic attack (TIA) or "mini stroke" is caused by a temporary disruption in the blood supply to part of the brain.

Trichomoniasis, sometimes called trich, is a sexually transmitted infection (STI) passed on though vaginal sex or sharing sex toys. It can cause serious problems if it's not treated.

Trigeminal neuralgia is sudden, severe facial pain. It's often describedas a sharp shooting pain or like having an electric shock in the jaw, teeth or gums.

Trigger finger is a condition that affects one or more of the hand's tendons, making it difficult to bend the affected finger or thumb.

Tuberculosis (TB) is an infection that usually affects the lungs. It can be treated with antibiotics but can be serious if not treated. There's a vaccine that helps protect some people who are at risk from TB.