What causes red rashes on the soles of the feet?

Red rashes on the soles of the feet may be caused by various factors. 1. Allergy is one of the common causes, possibly related to exposure to plant-, animal-, or chemical-derived allergens such as pollen, dust mites, and animal dander, leading to allergic reactions such as erythema and papules on the skin. 2. Tinea pedis (athlete's foot) is another possible cause, primarily resulting from fungal infection. It often presents with symptoms including red rashes, blisters, peeling skin, and itching on the soles of the feet. 3. Other dermatological conditions such as hand-foot-and-mouth disease, dyshidrotic eczema (pompholyx), eczema, palmoplantar pustulosis, and contact dermatitis may also lead to red rashes appearing on the soles of the feet. For cases presenting with red rashes on the soles of the feet, timely medical consultation is recommended to undergo relevant examinations such as dermoscopy in order to identify the exact cause and implement appropriate treatment. Meanwhile, it is important to keep the skin on the soles clean and dry, wear breathable cotton socks, and avoid using alkaline bathing products to alleviate symptoms and prevent worsening of the condition.