• Tailbone (coccyx) pain

• Tay-Sachs disease

• Teeth grinding (bruxism)

• Teeth whitening

• Temporal arteritis

• Temporomandibular disorder (TMD)

• Tendonitis

• Tennis elbow

• TENS (transcutaneous electrical nerve stimulation)

• Tension headaches

• Testicle lumps and swellings

• Testicle pain

• Testicular cancer

• Tetanus

• Thalassaemia

• The 'male menopause'

• Threadworms

• Thrombophilia

• Thrush in men and women

• Thumb pain

• Thyroid cancer

• Thyroiditis

• Tick-borne encephalitis (TBE)

• Tics

• Tight foreskin (phimosis)

• Tinnitus

• Tiredness and fatigue

• Toe pain

• Tongue-tie

• Tonsillitis

• Tooth decay

• Toothache

• Topical corticosteroids

• Total iron-binding capacity (TIBC) and transferrin test

• Total protein test

• Tourette's syndrome

• Toxic shock syndrome

• Toxocariasis

• Toxoplasmosis

• Tracheostomy

• Transient ischaemic attack (TIA)

• Transurethral resection of the prostate (TURP)

• Travel vaccinations

• Tremor or shaking hands

• Trichomoniasis

• Trigeminal neuralgia

• Trigger finger

• Trimethylaminuria ('fish odour syndrome')

• Tuberculosis (TB)

• Tuberous sclerosis

• Turner syndrome

• Twitching eyes and muscles

• Type 1 diabetes

• Type 2 diabetes

• Typhoid fever

• Typhus