What Causes Lump On Frenulum After Getting Tear?

Helloo. My boyfriend tore his frenulum about three weeks ago now, but it wasn't the first time. However, it has healed very differently this time. Quite a considerable lump has formed on his frenulum where the cut was. It's not hard and it quite pliable. I suggested that perhaps the cut was a lot deeper than we thought and theres now a pocket of blood, but it doesn't look purple. Maybe its abnormal scar tissue that needs fixing? However, after feeling it had healed we had sex last night and it is now inflamed. So I'm thinking sex was a mistake so soon. He didn't pull the foreskin back for a week or so after the cut so could that have affected the healing process. Some help would be awesome as I think he's starting to panic a little. Have looked in my anatomy books and there doesn't seem to be anything on torn frenulums. Anyway, thank you =)