My boyfriend of over 2 years has had occasional problems with a "cyst or lump" on his upper thigh/groin every 6 months or so (so he claims) and recently I found an empty prescription for valacyclovir knowing that could be the only thing that he was prescribed for it. I am very scared he is not telling me the truth after all these years. How do I ask him about this? Or can it actually be used to treat a cyst or lump?