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Dermatophyte infections occur in up to a quarter of the world's population, of which the hands and feet are most commonly involved. [3] It occurs worldwide. [ 3 ] One large study revealed around 84% of tinea manuum was associated with athlete's foot, of which 80% admitted scratching their feet, and 60% were male, [ 6 ]
Athlete's foot is the most common fungal disease, with possibly more than 50% of the population affected at some time. [2] [4] Tinea manuum accounts for less than 2% of all superficial fungal infections. [2] Tinea manuum is rare in both hands. [2] Scenarios with one foot and two hands, and one foot and one hand, have been described. [15]
[1] [7] Systemic fungal infections are more serious and include cryptococcosis, histoplasmosis, pneumocystis pneumonia, aspergillosis and mucormycosis. [3] Signs and symptoms range widely. [3] There is usually a rash with superficial infection. [2] Fungal infection within the skin or under the skin may present with a lump and skin changes. [3]
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Tinea nigra, also known as superficial phaeohyphomycosis and Tinea nigra palmaris et plantaris, [2] is a superficial fungal infection, a type of phaeohyphomycosis rather than a tinea, that causes usually a single 1–5 cm dark brown-black, non-scaly, flat, painless patch on the palms of the hands and the soles of the feet of healthy people. [1]
Tinea unguium: fungal infection of the fingernails and toenails, and the nail bed; Tinea corporis: fungal infection of the arms, legs, and trunk; Tinea cruris : fungal infection of the groin area; Tinea manuum: fungal infection of the hands and palm area; Tinea capitis: fungal infection of the scalp and hair; Tinea faciei (face fungus): fungal ...
Tolnaftate is included in many products for fungal skin infections such as athlete's foot, jock itch and ringworm. Del Campo says it's best, however, to opt for a preparation designed for nails.
The seal between the nail and finger acts as a physical barrier to prevent infection, however hyper-hydration or destruction of the epidermis can impair the barrier, allowing the bacteria to colonise. [medical citation needed] The nail turns green due to the bacteria secreting pigments such as pyocyanin [3] [4] and pyoverdin. [9]