Often this problem is due to bacteria that grow on the razor blade between uses. Shaving causes micro-abrasion on the skin surface which allows for the penetration of bacteria and causes razor bumps/acne. A disposable razor should only be used once if you are prone to break outs in the shaving area. An alternative is to use an electric razor that you take apart and then brush its blades (get a new toothbrush specifically for this) with rubbing alcohol after each use.
– Dr. Bussell
Beverly Hills Dermatology Consultants
433 N. Camden Drive, Suite 805 Beverly Hills, CA 90210 | 310-550-7661