We , as medical professionals, do not advise waxing or shaving in normal circumstances. Try trimming using any good quality trimmer available in the market. Do not share your trimmer with any one else, neither use any one else's. Maintain proper hygiene, and cleanliness. Avoid sharp tools, and avoid cuts. In case of any cut , even the smallest one, use betadine for washing the cuts, as well as before trimming. A normal common sensical hygiene n skin care should work. If you get rashes after trimming, it usually denotes allergy, consult a gynecologist, in case they persists after few hours.