Hello, So I've Been Excessively Masturbating For The Past Few

Hello, so I've been excessively masturbating for the past few weeks, and now there's a bump that appears to be a zit but larger. I've attempted to pop it but it's only been more irritated. It dosent hurt or burn. Is it an std? I've only had one sex partner and we've only done it with each other and the last time we had intercourse was a month ago. Can this be an std?