Soaking in a bath of warm water can alleviate the pain associated with the sores brought on by a flareup. A hot bath can help by doing two things: Keeping the sores clean, and simply helping you relax. Adding some Epsom salt to the bath will also help promote healing and could shorten your recovery time by drying out the sores faster [source: Grayson].
Following your bath, make sure to dry the affected areas thoroughly, as excess moisture could prolong symptomatic sores [source: Grayson]. If using a towel is painful, try using a hair dryer or fan. And wear only cotton underwear, as cotton absorbs moisture better than synthetic fabrics [source: WebMD].