Boils emit puss after 2-3 days staining my undergarments and are continuously​ paining. They are filled with puss and stays for about a week. After the puss is emitted it dries out and leaves a dark brown mark on my skin. This has happened 3-4 times before with an interval of about a month. I consulted a doctor before but did not find any solution. Is it because of stress? Or ingrown hair? I had trimmed my pubic hair about 2 weeks ago. For the first time in a log time I had irregular periods in this month otherwise they are regular. How to make the brown scars disappear?