Been playing bass for over 6 years now and never seemed to have an issue with bad calluses and blisters but now I do. Playing around 3 gigs a week and at least one practice session. My index finger and middle finger are getting torn up. Im getting huge bloody puss blisters on the ends of them, and i have to pop them all the time but then my fingers become raw and it hurts to play. I play pretty aggressively with my right hand and am doing a lot of slap. Any solutions as to how I can minimize these blisters? is there anything I can put on my fingers while I play to keep them from coming back?