friction blister on circumcision scar

Semi off-topic, but I am a PE’er with a penis injury, just didn’t get it from PE. My wife gave me a couple epic handjobs and a nice boink or two over the last few days. I developed a large red blister on the side of my circumcision scar, exactly the same type you get from pumping at too high of a vacuum. Can somebody give me an idea how long I will need to leave it alone before it heals completely? The skin is not broken at all, and I want to keep it that way.