Redness on the soles of the feet may be due to the following reasons: 1. It may be caused by excessive friction, such as walking or running barefoot on the ground or wearing shoes that are too tight, which may lead to skin breakdown or subcutaneous damage, resulting in the above symptoms. 2. 3. May be caused by infection, such as fungal or bacterial infection, which may lead to redness, heat and swelling. 4. May be caused by peripheral neuropathy, such as lumbar disc herniation, which may occur in one side of the foot due to nerve root stimulation. 5. Burns and frostbite may also have similar symptoms.