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A member asked:
Tested neg for stds. last night had oral sex with ex boyfriend. less than 24hrs later have ulcer on roof of mouth. too early for std? scratch maybe?
A doctor has provided 1 answer
Observation: The average incubation period after exposure for the first time is 4 days (range, 2 to 12 days). Reactivation of dormant lesions after prior exposure may be sooner. The vesicles break and leave painful ulcers that may take two to four weeks to heal. If persisted or worsened, see your PCP.
Answered 3/14/2015
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