Tbigur
You probably got your blister from applying too much pressure for too long a time following max-out and/or the tube is too small. I think both apply usually.
If a person wants to keep pumping following maxing out, he should go to the next stage (next cylinder size up), thus multi stage pumping.
Depending on the depth and size of your blister, it most likely could linger on for quite a spell (2 to 6 months is possible).
Do not pump until it is “well beyond” healed. By “well beyond”, i am saying that although on the outer surface the area may look healed it most likely isn’t on the inside where you can’t see.
Pumping before it is completely healed will only aggravate that area and further prolong the healing time.
What ever you choose to apply to your wound, try to keep a balance (allowing it to also have fresh air to breath).
Mild and easy forms of manual pe for the mean time will help since blood has healing agents in it.
You will just have to live with it for a while and that will serve as a reminder/lesson well learned through the most effective teaching tool, Experience.
As long as you let it heal and not allow infection to come into being, your blister is no worse than any other blister. You may experience a reddish mark that looks as if it is never going to disappear, but it will in it’s due time.
Good luck & keep us informed my friend.
EDIT: Go to any Harbor Freight store (on the street or online) and buy a Mity-Vac hand pump with gauge and quick release trigger for only $29. ALSO: Consider this as one downside to tubes that taper at the head-end as compared to the UNflared straight walled tubes.