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Chronic paronychia is an infection of the folds of tissue surrounding the nail of a finger or, less commonly, a toe, lasting more than six weeks. [4] It is a nail disease prevalent in individuals whose hands or feet are subject to moist local environments, and is often due to contact dermatitis .
Anatomy of the basic parts of a human nail.A. Nail plate; B. lunula; C. root; D. sinus; E. matrix; F. nail bed; G. eponychium; H. free margin. Onychia is an inflammation of the nail folds (surrounding tissue of the nail plate) of the nail with formation of pus and shedding of the nail.
While yellow nails may seem simple, it can be tough for even experts to pinpoint the cause. Dermatologists share nine yellow nail causes and how to treat them.
Onychomycosis, also known as tinea unguium, [4] is a fungal infection of the nail. [2] Symptoms may include white or yellow nail discoloration, thickening of the nail, and separation of the nail from the nail bed. [2]
Green nail syndrome (chloronychia or Goldman-Fox syndrome [7]) is characterised by discolouration of the infected nail, inflammation of the skin around the nail known as paronychia, and an odour resembling fruit. [3] The colour may range from light or blueish green or yellow-green to darker green or black.
An ingrown nail, also known as onychocryptosis (from Greek: ὄνυξ (onyx) 'nail' and κρυπτός (kryptos) 'hidden') is a common form of nail disease.It is an often painful condition in which the nail grows so that it cuts into one or both sides of the paronychium or nail bed.
[19] [20] Clinically, the diagnosis of any particular skin condition is made by gathering pertinent information regarding the presenting skin lesion(s), including the location (such as arms, head, legs), symptoms (pruritus, pain), duration (acute or chronic), arrangement (solitary, generalized, annular, linear), morphology (macules, papules ...
Skin disorders such onychomycosis, paronychia, psoriasis, lichen planus, amyloidosis, and chronic radiodermatitis can cause inflammation, which can activate melanocytes and result in the formation of a light-brown band. Melanonychia frequently develops after the inflammatory process has resolved. [5]