DactylitisDandruffDe Quervain's thyroiditisDeafblindnessDeafnessDecongestant medicationDeep vein thrombosisDeep vein thrombosis (DVT)DehydrationDementia with Lewy bodiesDengueDental abscessDental cariesDental decayDental fluorosisDentures (false teeth)DepressionDepression (clinical)Dermal fillersDermatochalasisDetached retinaDevelopmental co-ordination disorder (DCD)Devic's diseaseDEXA scanDi George syndrome (22q11 deletion)DiabetesDiabetes insipidusDiabetic ketoacidosisDiabetic retinopathyDialysisDiaphragms and capsDiarrhoeaDiarrhoea and sickness in childrenDietDifficulty speaking (dysarthria)Digital rectal examinationDilatation and curettage (D&C)DiphtheriaDiphyllobothrium latumDiplopiaDiscoid eczemaDislocated kneecapDislocated shoulderDisorders of consciousnessDisorders of sex developmentDissociative disordersDiverticular disease and diverticulitisDizzinessDog bitesDouble visionDown's syndromeDry eye syndromeDry lipsDry mouthDuct ectasiaDuct papillomaDupuytren's contractureDVTDwarfismDXA scanDysarthria (difficulty speaking)DysenteryDyslexiaDysmenorrhoeaDyspepsiaDysphagiaDyspnoeaDyspraxia (adults)Dyspraxia in childrenDystonia