My Dear Welcome to this site! I have noted your history and think that you are having a bacterial infection called Folliculitis which has a tendency to spread as is the case in your history. This type of infection in my patients responds very well to maintaining good hygiene, local and oral antibiotics like Mupirocin and Linezolid respectively and pain killers if necessary. as you had an accident in the past involving affected area, it appears that the kin of the said area has low resistance to infection which makes you prone to certain infections like the present one. I am sure you will now take good car of yourself and avoid getting such infections in the first place. Best wishes!