Question: how long for doxycycline to work for skin infection?
Answer: What if I don't get better? If you have rosacea, doxycycline works slowly to treat it. Your doctor will usually review you after 4 to 6 weeks to check how well the medicine is working. If you are taking doxycycline for any other infection, tell your doctor if you don't start feeling better after 3 days.