There's no sure-fire way to stop acne flare-ups, but there are steps you can take that will help. Try to keep hair spray and gel away from your face's skin as much as you can. These products contain ingredients, from alcohols to oils that can dry out skin and cause flare-ups.
When you are trying to reduce or eliminate acne, water is your best friend. Make sure to drink enough water every day. If your skin becomes dry, there are dead skin cells that will sit on the surface of your face and wind up clogging your pores. When the pores are clogged, acne symptoms will become worse. Drinking at least 8 glasses of water a day helps the skin to stay hydrated and effectively shed dead skin cells.
For clear, acne-free skin, consider applying tea tree oil to the spots where you are acne-prone. A natural astringent, tea tree oil will not dry out your skin.