Cotrimoxazole, which contains trimethoprim and sulphamethoxazole, is mainly an antibiotic used to control bacterial infections. It does not directly ?dry? or heal a wound by itself, but if a wound is infected with bacteria, treating that infection can help the wound heal better and reduce redness, swelling, pus formation, or delayed healing. So, its main role is infection control rather than speeding up normal wound healing in a healthy wound. Whether it is useful depends on the type of wound, the presence of infection, and the bacteria involved. Taking antibiotics when they are not needed may not help and can sometimes lead to side effects or antibiotic resistance. Proper wound cleaning, dressing changes, good nutrition, hydration, diabetes control if present, and avoiding repeated irritation are also very important for healing. If the wound has increasing pain, a bad smell, fever, spreading redness, black discolouration, or is not improving after a few days, it is important to get it examined by a doctor for proper treatment guidance.