Hi
There can be various causes for iching
in thighs such as irritant
rash, scabies, eczema, lichen planus, psoriasis, fungal infection (tinea), erythema multiforme, dyshidrotic dermatitis, etc.
The most common cause is tinea, a group of skin infections caused by fungus dermatophytes. These fungi can infect any part of the skin, hair and nails. Tinea grows usually on warm moist skin such as skin between the toes, groin area, underarms, below the breasts.