Health advice
Health A to Z
Trusted information on 640 conditions, symptoms and treatments from the NHS. Choose a topic to read more, and pop in or call us if you would like advice.
A
- Abdominal aortic aneurysm
- Acanthosis nigricans
- Achalasia
- Acid and chemical burns
- Acid reflux in babies, see Reflux in babies
- Acid reflux, see Heartburn and acid reflux
- Acne
- Acoustic neuroma (vestibular schwannoma)
- Acromegaly
- Actinic keratoses (solar keratoses)
- Actinomycosis
- Acute cholecystitis
- Acute kidney injury (AKI)
- Acute lymphoblastic leukaemia
- Acute myeloid leukaemia
- Acute pancreatitis
- Acute respiratory distress syndrome (ARDS)
- Addison's disease
- Adenomyosis
- ADHD in adults
- ADHD in children and young people
- Age-related macular degeneration (AMD)
- Albinism
- Alcohol poisoning
- Alcohol-related liver disease (ARLD)
- Alcohol-use disorder
- Allergic rhinitis
- Allergies
- Altitude sickness
- Alzheimer's disease
- Amblyopia, see Lazy eye
- Amyloidosis
- Anabolic steroid misuse
- Anaemia (iron deficiency), see Iron deficiency anaemia
- Anal cancer
- Anal fissure
- Anal fistula
- Anaphylaxis
- Androgen insensitivity syndrome
- Aneurysm (brain), see Brain aneurysm
- Angelman syndrome
- Angina
- Angioedema
- Animal and human bites
- Ankles (swollen), see Swollen ankles, feet and legs (oedema)
- Ankylosing spondylitis
- Antiphospholipid syndrome (APS)
- Aphasia
- Appendicitis
- Arrhythmia, see Heart rhythm problems (arrhythmia)
- Arthritis
- Asbestosis
- Aspergillosis
- Asthma
- Astigmatism
- Ataxia
- Atherosclerosis
- Athlete's foot
- Atopic eczema
- Atrial fibrillation
- Auditory processing disorder (APD)
- Autism
- Autosomal dominant polycystic kidney disease
- Autosomal recessive polycystic kidney disease
- Avian flu, see Bird flu
B
- Back pain
- Bacterial vaginosis
- Baker's cyst
- Balanitis
- Bartholin's cyst
- Bedbugs
- Behçet's disease
- Bell's palsy
- Benign brain tumours, see Non-cancerous (benign) brain tumours
- Benign prostate enlargement, see Enlarged prostate
- Bile duct cancer (cholangiocarcinoma)
- Bilharzia, see Schistosomiasis (bilharzia)
- Birthmarks
- Black eye
- Bladder cancer
- Bladder pain syndrome (BPS)
- Bladder stones
- Blepharitis
- Blisters
- Blood pressure (high), see High blood pressure
- Blood pressure (low), see Low blood pressure (hypotension)
- Boils
- Bone cancer
- Bone cyst
- Botulism
- Bowel cancer
- Bowel incontinence
- Bowel polyps
- Bowen's disease
- Brain abscess
- Brain haemorrhage, see Subarachnoid haemorrhage
- Brain tumours
- Breast abscess
- Breast cancer in men
- Breast cancer in women
- Broken ankle
- Broken arm or wrist
- Broken collarbone
- Broken finger or thumb
- Broken hip
- Broken leg
- Broken nose
- Broken or bruised ribs
- Broken toe
- Bronchiectasis
- Bronchiolitis
- Bronchitis
- Brucellosis
- Brugada syndrome
- Bullous pemphigoid
- Bunions
- Burns and scalds
- Bursitis
C
- Cancer
- Carbon monoxide poisoning
- Cardiomyopathy
- Cardiovascular disease
- Carpal tunnel syndrome
- Cataracts (children), see Childhood cataracts
- Cataracts in adults
- Catarrh
- Cavernoma
- Cellulitis
- Cerebral palsy
- Cervical cancer
- Cervical spondylosis
- Charcot-Marie-Tooth disease
- Charles Bonnet syndrome
- Chest infection
- Chiari malformation
- Chickenpox
- Chilblains
- Chipped, broken or cracked tooth
- Chlamydia
- Cholera
- Cholesteatoma
- Cholesterol (high), see High cholesterol
- Chronic kidney disease
- Chronic lymphocytic leukaemia
- Chronic myeloid leukaemia
- Chronic obstructive pulmonary disease (COPD)
- Chronic pancreatitis
- Chronic traumatic encephalopathy
- Cirrhosis
- CJD, see Creutzfeldt-Jakob disease
- Cleft lip and palate
- Clostridioides difficile (C. diff) infection
- Clubfoot
- Cluster headaches
- Coccyx pain, see Tailbone (coccyx) pain
- Coeliac disease
- Cold sores
- Colic
- Colour vision deficiency (colour blindness)
- Common cold
- Compartment syndrome
- Complex regional pain syndrome
- Concussion, see Head injury and concussion
- Congenital heart disease
- Congenital hip dislocation, see Developmental dysplasia of the hip
- Conjunctivitis
- Constipation
- Contact dermatitis
- Corns and calluses
- Coronary heart disease
- Coronavirus, see COVID-19
- Corticobasal degeneration
- Costochondritis
- Cradle cap
- Craniosynostosis
- Crohn's disease
- Croup
- Cushing's syndrome
- Cuts and grazes
- Cyclical vomiting syndrome
- Cyclospora
- Cystic fibrosis
- Cystitis, see Urinary tract infections (UTIs)
- Cytomegalovirus (CMV)
D
- Dandruff
- Deafness, see Hearing loss
- Dehydration
- Dementia
- Dementia (frontotemporal), see Frontotemporal dementia
- Dementia (vascular), see Vascular dementia
- Dementia with Lewy bodies
- Dengue
- Dental abscess
- Detached retina (retinal detachment)
- Developmental co-ordination disorder (dyspraxia) in children
- Diabetes
- Diabetes (type 1), see Type 1 diabetes
- Diabetes (type 2), see Type 2 diabetes
- Diabetes in pregnancy, see Gestational diabetes
- Diabetes insipidus
- Diabetic ketoacidosis
- Diabetic retinopathy
- Differences in sex development
- DiGeorge syndrome (22q11 deletion)
- Diphtheria
- Discoid eczema
- Dislocated kneecap
- Dislocated shoulder
- Diverticular disease and diverticulitis
- Down's syndrome
- Dupuytren's contracture
- DVT (deep vein thrombosis)
- Dwarfism, see Restricted growth (dwarfism)
- Dysarthria (difficulty speaking)
- Dysentery
- Dyslexia in adults
- Dyslexia in children
- Dyspraxia in adults
- Dystonia
E
- Ear infections
- Eardrum (burst), see Perforated eardrum
- Early or delayed puberty
- Early or premature menopause
- Earwax build-up
- Ebola virus disease
- Ectopic pregnancy
- Ectropion
- Eczema (varicose), see Varicose eczema
- Edwards' syndrome (trisomy 18)
- Ehlers-Danlos syndromes
- Ejaculation problems
- Encephalitis
- Endocarditis
- Endometrial cancer, see Womb (uterus) cancer
- Endometriosis
- Epidermolysis bullosa
- Epididymitis
- Epiglottitis
- Epilepsy
- Erectile dysfunction (impotence)
- Erythema multiforme
- Erythema nodosum
- Erythrocytosis
- Erythromelalgia
- Excessive daytime sleepiness (hypersomnia)
- Excessive sweating (hyperhidrosis)
- Eye cancer
- Eye cancer in children, see Retinoblastoma
- Eye infection (herpes), see Herpes simplex eye infections
- Eye injuries
F
- Face blindness, see Prosopagnosia (face blindness)
- Falls
- Febrile seizures
- Female genital mutilation (FGM)
- Fetal alcohol spectrum disorder
- Fibroids
- Fibromyalgia
- Flat feet
- Flat head syndrome (plagiocephaly and brachycephaly)
- Flu
- Food allergy
- Food intolerance
- Food poisoning
- Foot drop
- Foreskin problems, see Tight foreskin (phimosis)
- Frostbite
- Frozen shoulder
- Functional neurological disorder, see Medically unexplained symptoms
- Fungal nail infection
G
- Gallbladder cancer
- Gallstones
- Ganglion cyst
- Gangrene
- Gastritis
- Gastroparesis
- Gender dysphoria and incongruence
- Genital herpes
- Genital warts
- German measles, see Rubella (german measles)
- Giant cell arteritis, see Temporal arteritis
- Giardia, see Giardiasis
- Gilbert's syndrome
- Glandular fever
- Glaucoma
- Glomerulonephritis
- Glue ear
- Goitre
- Gonorrhoea
- Gout
- Granuloma annulare
- Granulomatosis with polyangiitis (GPA)
- Group B strep
- Growing pains
- Guillain-Barré syndrome
- Gum disease
- Gynaecomastia
H
- Haemochromatosis
- Haemolytic disease of the fetus and newborn (HDFN)
- Haemophilia
- Haemophilus influenzae type b (Hib)
- Haemorrhoids, see Piles (haemorrhoids)
- Hamstring injury
- Hand, foot and mouth disease
- Hantavirus
- Hay fever
- Head lice and nits
- Headaches (tension-type), see Tension headaches
- Heart attack
- Heart block
- Heart failure
- Heart valve disease
- Heat exhaustion and heatstroke
- Heat rash (prickly heat)
- Heavy periods
- Henoch-Schönlein purpura (HSP)
- Hepatitis
- Hepatitis A
- Hepatitis B
- Hepatitis C
- Hereditary haemorrhagic telangiectasia (HHT)
- Hereditary spastic paraplegia
- Hernia
- Hernia (hiatus), see Hiatus hernia
- Hernia (umbilical), see Umbilical hernia
- Herpes in babies, see Neonatal herpes (herpes in a baby)
- Herpetic whitlow (whitlow finger)
- Hidradenitis suppurativa (HS)
- High blood sugar (hyperglycaemia)
- Hirschsprung's disease
- HIV and AIDS
- Hives
- Hodgkin lymphoma
- Human papillomavirus (HPV)
- Huntington's disease
- Hydrocephalus
- Hydronephrosis
- Hyperacusis, see Noise sensitivity (hyperacusis)
- Hyperparathyroidism
- Hyperthyroidism, see Overactive thyroid (hyperthyroidism)
- Hypoglycaemia, see Low blood sugar (hypoglycaemia)
- Hypoparathyroidism
- Hypothermia
- Hypothyroidism, see Underactive thyroid (hypothyroidism)
I
J
K
L
- Labial fusion
- Labyrinthitis and vestibular neuritis
- Lactose intolerance
- Lambert-Eaton myasthenic syndrome
- Laryngeal cancer
- Laryngitis
- Learning disabilities
- Leg cramps
- Leg ulcer, see Venous leg ulcer
- Legionnaires' disease
- Leptospirosis (Weil's disease)
- Leukoplakia
- Lichen planus
- Lichen sclerosus
- Lipoedema
- Lipoma
- Listeriosis
- Liver cancer
- Liver disease
- Long COVID
- Long QT syndrome
- Long-sightedness
- Low sperm count
- Low white blood cell count
- Lung cancer
- Lupus
- Lyme disease
- Lymphoedema
- Lymphoma (non-Hodgkin, see Non-Hodgkin lymphoma
M
- Macular hole
- Malaria
- Male menopause, see The 'male menopause'
- Malignant brain tumour (brain cancer)
- Mallet finger
- Malnutrition
- Marfan syndrome
- Mastitis
- Mastocytosis
- Mastoiditis
- Measles
- Melanoma skin cancer
- Meningitis
- Menopause and perimenopause
- Mesothelioma
- Metabolic syndrome
- Middle East respiratory syndrome (MERS)
- Migraine
- Miscarriage
- Molar pregnancy
- Moles
- Molluscum contagiosum
- Morton's neuroma
- Motion sickness
- Motor neurone disease (MND)
- Mouth cancer
- Mouth thrush, see Oral thrush (mouth thrush)
- Mouth ulcers
- Mpox
- MRSA
- Mucositis
- Multiple sclerosis
- Multiple system atrophy (MSA)
- Mumps
- Muscular dystrophy
- Myalgic encephalomyelitis or chronic fatigue syndrome (ME/CFS)
- Myasthenia gravis
- Myelodysplastic syndrome (MDS)
- Myeloma
- Myopia, see Short-sightedness (myopia)
- Myositis
- Ménière's disease
N
- Narcolepsy
- Nasal and sinus cancer
- Nasal polyps
- Nasopharyngeal cancer
- Necrotising fasciitis
- Nephrotic syndrome in children
- Neurofibromatosis type 1 (NF1)
- Neurofibromatosis type 2 (NF2)
- Neuromyelitis optica (NMO)
- Newborn respiratory distress syndrome
- Night terrors and nightmares
- Non-alcoholic fatty liver disease (NAFLD)
- Non-allergic rhinitis
- Non-melanoma skin cancer
- Noonan syndrome
- Norovirus (vomiting bug)
- Nosebleed
O
- Obesity, see Overweight and obesity in adults
- Ocular migraine, see Retinal (ocular) migraine
- Oesophageal atresia and tracheo-oesophageal fistula
- Oesophageal cancer
- Orf
- Osteoarthritis
- Osteomalacia, see Rickets and osteomalacia
- Osteomyelitis
- Osteophyte (bone spur)
- Osteoporosis
- Otosclerosis
- Ovarian cancer
- Ovarian cyst
P
- Paget's disease of bone
- Paget's disease of the nipple
- Pancreatic cancer
- Parkinson's disease
- Patau's syndrome
- PCOS, see Polyendocrine metabolic ovarian syndrome (PMOS)
- Pelvic inflammatory disease
- Pelvic organ prolapse
- Pemphigus vulgaris
- Penile cancer
- Peptic ulcer, see Stomach ulcer
- Pericarditis
- Periods
- Peripheral arterial disease (PAD)
- Peripheral neuropathy
- Peritonitis
- Peyronie's disease
- Phaeochromocytoma
- Phlebitis (superficial thrombophlebitis)
- Pilonidal sinus
- Pityriasis rosea
- Pityriasis versicolor
- Plantar fasciitis
- Pleurisy
- PMDD (premenstrual dysphoric disorder)
- PMS (premenstrual syndrome)
- Pneumonia
- Poisoning
- Polio
- Polyhydramnios (too much amniotic fluid)
- Polymorphic light eruption
- Polymyalgia rheumatica
- Pompholyx (dyshidrotic eczema)
- Post-herpetic neuralgia
- Postural tachycardia syndrome (PoTS)
- Prader-Willi syndrome
- Pre-eclampsia
- Pressure ulcers (pressure sores)
- Primary biliary cholangitis (primary biliary cirrhosis)
- Problems swallowing pills
- Progressive supranuclear palsy
- Prostate cancer
- Prostatitis
- Psoriasis
- Psoriatic arthritis
- Pubic lice
- Pudendal neuralgia
- Pulmonary embolism
- Pulmonary hypertension
- Pyoderma gangrenosum
R
S
- Salivary gland stones
- Sarcoidosis
- Scabies
- Scarlet fever
- Scars
- Sciatica
- Scleroderma
- Scoliosis
- Scurvy
- Sepsis
- Septic arthritis
- Sexually transmitted infections (STIs)
- Shin splints
- Shingles
- Shoulder impingement
- Sick building syndrome
- Sickle cell disease
- Silicosis
- Sinusitis (sinus infection)
- Sjögren's syndrome
- Skin abscess
- Skin cyst
- Skin tags
- Slapped cheek syndrome
- Sleep apnoea
- Sleep paralysis
- Sleepwalking
- Slipped disc
- Snake bites
- Soft tissue sarcoma
- Spina bifida
- Spinal muscular atrophy (SMA)
- Spondylolisthesis
- Sprains and strains
- Squint
- Stammering
- Staph infection
- Stevens-Johnson syndrome
- Stillbirth
- Stomach cancer
- Strep A
- Stretch marks
- Stroke
- Stye
- Subdural haematoma
- Sunburn
- Supraventricular tachycardia (SVT)
- Swollen arms and hands (oedema)
- Syphilis
T
- TB, see Tuberculosis (TB)
- Tendonitis
- Tennis elbow
- Testicular cancer
- Tetanus
- Thalassaemia
- Thoracic outlet syndrome
- Threadworms
- Thrombophilia
- Thrush in men and women
- Thyroid cancer
- TIA, see Transient ischaemic attack (TIA)
- Tick-borne encephalitis (TBE)
- Tics
- Tinnitus
- Tongue-tie
- Tooth decay
- Tourette syndrome
- Toxic shock syndrome
- Toxocariasis
- Toxoplasmosis
- Trichomoniasis
- Trigeminal neuralgia
- Trigger finger
- Turner syndrome
- Typhoid fever
- Typhus
V
Information is provided by the NHS and links open on nhs.uk. This is general information and not a substitute for professional advice. Always speak to a pharmacist or GP about your own health, and call 999 in an emergency.