Blister may be take analgesic anti inflammatory drug like tab NucoxiaMR1-0-1 For 3days  cap becosules1-0-0 for 3days  and apply locally diloderm maxi ointment 2 times a day tab clonotril0.5mg 1-0-1for 3days  douch the local area with ice cold water  and use lactacyd intimate lotion locally rest to part locally for 3days good luck bye