What is the condition characterized by watery blisters and thickened whitish skin between the toes?

The condition characterized by watery blisters and thickened whitish skin between the toes is tinea pedis, commonly known as athlete's foot. This fungal infection typically occurs in warm, moist environments, making the spaces between the toes particularly susceptible.

Tinea pedis manifests as peeling, scaling, or blistering skin, often accompanied by itchiness and a burning sensation. The watery blisters can break and lead to further discomfort, making it crucial to identify and treat the condition appropriately.

While onychomycosis refers to a fungal infection of the nails and psoriasis is a chronic skin condition that causes rapid skin cell turnover, neither directly correlates with the specific symptoms of watery blisters or thickened white skin between the toes. A general term like "fungal infection" does not specifically identify the distinct symptoms and location associated with tinea pedis, making it less precise. Thus, the unique presentation of watery blisters and skin changes accurately points to tinea pedis as the correct answer.