I try to always keep an aloe plant growing. I have used this plant so many times. Just tear a leaf off and open it up. The sticky gooie stuff inside is so cool. Everytime I use it, I never blister.
Before I got an aloe plant, I tipped a cup of hot water on me. I was canning. It went all down my stomach and leg. I run to the bathroom and kept putting cold rags on it. I was amazed it did not blister at all. I was so lucky.
Hope your fingers get better soon.