• Dandruff

• Deafblindness

• Decongestants

• Dehydration

• Dementia with Lewy bodies

• Dengue

• Dental abscess

• Dentures (false teeth)

• Detached retina (retinal detachment)

• Developmental co-ordination disorder (dyspraxia) in children

• Developmental dysplasia of the hip

• Diabetes

• Diabetes insipidus

• Diabetic eye screening

• Diabetic ketoacidosis

• Diabetic retinopathy

• Dialysis

• Diarrhoea and vomiting

• Differences in sex development

• DiGeorge syndrome (22q11 deletion)

• Diphtheria

• Discoid eczema

• Dislocated kneecap

• Dislocated shoulder

• Disorders of consciousness

• Diverticular disease and diverticulitis

• Dizziness

• Do not attempt cardiopulmonary resuscitation (DNACPR) decisions

• Double vision

• Down's syndrome

• Dry eyes

• Dry mouth

• Dupuytren's contracture

• DVT (deep vein thrombosis)

• Dysarthria (difficulty speaking)

• Dysentery

• Dyslexia

• Dysphagia (swallowing problems)

• Dyspraxia (developmental co-ordination disorder) in adults

• Dystonia