Chronic paronychia is often caused by Candida, but it is distinguished from acute bacterial paronychia by its boggy, less tender swelling of the proximal nail fold and absence of a purulent abscess.
This is a benign tumor under the nail, distinguished by the classic triad of severe paroxysmal pain, cold sensitivity, and a localized point of tenderness.
This is a herpes simplex infection of the finger, distinguished by the presence of vesicles on an erythematous base, rather than a bacterial abscess.
This is a benign ganglion cyst of the distal interphalangeal joint, presenting as a translucent, gelatinous-filled papule at the base of the nail, which may cause a groove in the nail plate.
Squamous cell carcinoma of the nail unit can present as a persistent, non-healing paronychia or a destructive lesion of the nail bed, suspected when it fails to respond to conventional therapy.
Also known as a Koenen tumor, this is a fibrous growth emerging from under the proximal nail fold and is a characteristic finding of tuberous sclerosis.
