Skin infections are a common medical issue that can be caused by a variety of factors. Sores, which is the answer to the crossword clue, is one type of skin infection that can be caused by bacterial or viral infections, allergies, or even physical trauma. Sores can appear as red bumps, blisters, or open wounds and can be painful and itchy. Treatment for sores depends on the cause and can range from topical creams to antibiotics.