recently (last 2 days) i developed a rather large, red, itchy bump on the shaft of my penis and am wondering what it could be. i have not had sex in a year, but the last (and first) time was with a bit of a... well let's just say she gets around. i went camping recently (few days ago) and have bug bites on my hip and ankle. could the bump on my penis be a bug bite or something more serious? also, last week a tiny bump appeared at the base of my penis, but went away after a few days which led me to believe it to be a bug bite. any info will help.