Final answer:
Watery blisters and thickened whitish skin between the toes is known as athlete's foot, which is a common fungal infection. Other skin conditions like psoriasis or various forms of skin cancer, such as melanoma, are characterized by itchy red patches with scales, discolored lesions, or large brown spots with dark specks.
Step-by-step explanation:
Watery blisters and thickened whitish skin between the toes is known as athlete's foot or tinea pedis. This is a common fungal infection of the skin on the feet, often occurring in warm, moist environments such as the area between the toes. An individual can contract the fungus through direct contact with an infected person or by touching surfaces contaminated with the fungus, like locker room floors or showers.
Additional skin symptoms may include itchy or sore patches of thick, red skin with silvery scales that can affect various parts of the body such as the elbows, knees, and scalp. This description rather fits the symptoms of psoriasis. Exposure to the sun with insufficient protection may lead to sunburn, causing skin blisters, indicating damage to the epidermis and possibly the dermis layers of the skin. Other skin conditions and their symptoms, such as the appearance of a large brown spot on the skin sprinkled with darker specks or a dark lesion on the palms or soles, suggest different forms of skin cancer, including melanoma.