WAlzheimer's disease
WAttention deficit hyperactivity disorder
WBaby colic
WBalkan endemic nephropathy
WBell's palsy
WBenign fasciculation syndrome
WCalciphylaxis
WCluster headache
WDancing maniaWDancing plague of 1518
WDementia with Lewy bodies
WEncephalitis lethargica
WFibromyalgia
WFloating–Harbor syndrome
WGeographic tongue
WTenosynovial giant cell tumor
WGranuloma annulare
WGulf War syndrome
WAcute interstitial pneumonitis
WHenoch–Schönlein purpura
WIdiopathic intracranial hypertension
WInterstitial cystitis
WIrritable bowel syndrome
WKawasaki disease
WLichen sclerosus
WLimbic-predominant age-related TDP-43 encephalopathy
WMultiple sclerosis
WMultisystem inflammatory syndrome in children
WNarcolepsy
WNeurosarcoidosis
WNodding disease
WParkinson's disease
WPelvic painWTenosynovial giant cell tumor
WPityriasis rosea
WPosterior cortical atrophy
WPrurigo nodularis
WReye syndrome
WSarcoidosis
WScheuermann's disease
WScrapie
WSenescence
WSjögren syndrome
WSpontaneous cerebrospinal fluid leak
WSudden infant death syndrome
WSweating sickness
WSynovial osteochondromatosis
WSystemic scleroderma
WTarantism
WTemporomandibular joint dysfunctionWTenosynovial giant cell tumor
WTorticollis
WTrigger finger
WVillitis of unknown etiology
WVisual snow