Zika virus disease
Zoonosis

Vaginal cancer
Vaginal discharge
Varicose eczema
Venous leg ulcer
Vertigo
Vitamin B12 or folate deficiency anaemia
Vomiting in adults
Vulval cancer
Warts and verrucas
Whooping cough
Wilms’ tumour
Womb (uterus) cancer
Yellow fever

Testicular cancer
Testicular cancer: Teenagers and young adults
Testicular lumps and swellings
Thirst
Threadworms
Thrush
Thyroid cancer
Thyroid cancer: Teenagers and young adults
Tinnitus
Tonsillitis
Tooth decay
Toothache
Transient ischaemic attack (TIA)
Trigeminal neuralgia
Tuberculosis (TB)
Type 1 diabetes
Type 2 diabetes
Trichomonas infection
Transverse myelitis
Ulcerative colitis
Underactive thyroid
Urinary incontinence
Urinary tract infection (UTI)
Urinary tract infection (UTI) in children
Urticaria (hives)

Rare tumours
Raynaud's phenomenon
Reactive arthritis
Restless legs syndrome
Retinoblastoma: Children
Rhabdomyosarcoma
Rheumatoid arthritis
Ringworm and other fungal infections
Rosacea
Scabies
Scarlet fever
Schizophrenia
Scoliosis
Septic shock
Shingles
Shortness of breath
Sickle cell disease
Sinusitis
Sjogren's syndrome
Skin cancer (melanoma)
Skin cancer (non-melanoma)
Slapped cheek syndrome
Soft tissue sarcomas
Soft tissue sarcomas: Teenagers and young adults
Sore throat
Spleen problems and spleen removal
Stillbirth
Stomach ache and abdominal pain
Stomach cancer
Stomach ulcer
Streptococcus A (strep A)
Stress, anxiety and low mood
Stroke
Sudden infant death syndrome (SIDS)
Suicide
Sunburn
Swollen glands
Syphilis

Obesity
Obsessive compulsive disorder (OCD)
Obstructive sleep apnoea
Oesophageal cancer
Oral thrush in adults
Osteoporosis
Osteosarcoma
Otitis externa
Ovarian cancer
Ovarian cancer: Teenagers and young adults
Ovarian cyst
Overactive thyroid
Paget's disease of the nipple
Pancreatic cancer
Panic disorder
Parkinson's disease
Patau's syndrome
Pelvic inflammatory disease
Pelvic organ prolapse
Penile cancer
Peripheral neuropathy
Personality disorder
Pleurisy
Pneumonia
Polymyalgia rheumatica
Post-polio syndrome
Post-traumatic stress disorder (PTSD)
Postnatal depression
Pregnancy and baby
Pressure ulcers
Prostate cancer
Psoriasis
Psoriatic arthritis
Psychosis
Pubic lice

Malaria
Malignant brain tumour (cancerous)
Malnutrition
Measles
Meningitis
Menopause
Mesothelioma
Middle ear infection (otitis media)
Migraine
Miscarriage
Motor neurone disease (MND)
Mouth cancer
Mouth ulcer
Multiple myeloma
Multiple sclerosis (MS)
Mumps
Meniere's disease
Myasthenia gravis
Nasal and sinus cancer
Nasopharyngeal cancer
Neuroblastoma: Children
Neuroendocrine tumours
Non-alcoholic fatty liver disease (NAFLD)
Non-Hodgkin lymphoma
Non-Hodgkin lymphoma: Children
Norovirus
Nosebleed