Bacterial skin infections are common and can range from mild to severe. Five notable types include: 1. Impetigo: A highly contagious infection characterized by red sores that quickly rupture, ooze, and form a yellow-brown crust. 2. Cellulitis: An infection of the deeper layers of skin, causing redness, swelling, and pain. 3. Abscess: A localized collection of pus caused by bacterial infection, leading to painful swelling. 4. Folliculitis: Infection of hair follicles resulting in red, inflamed bumps. 5. Erysipelas: A more superficial form of cellulitis with clear boundaries, often involving the face. Azithromycin 500 mg is an antibiotic that can be effective in treating these infections, especially those caused by specific bacteria. It works by inhibiting bacterial protein synthesis, which helps to clear the infection. Always consult a healthcare provider to determine the appropriate treatment for your condition.