You should see a doctor for a bacterial infection if symptoms persist for more than a few days, worsen over time, or include high fever, severe pain, or swelling. Early medical attention is essential to prevent complications. If prescribed antibiotics like cephalexin, complete the full course as directed. Cephalexin capsules are commonly used to treat infections such as skin, respiratory, and urinary tract infections. Always obtain medications from a trusted cephalexin capsules supplier to ensure quality and safety. Delaying treatment can lead to more serious health issues, so consult a healthcare provider promptly for accurate diagnosis and care.