I am struggling with thumb problems. I have pain & blisters on the outside of my thumb. I do not throw fast or with high revs. My thumb swells & shrinks a lot. I have 4 thumb plugs and use tape for fit. I must slowly force my thumb into my ball and I use different tricks to get my thumb into the hole including lip balm, handkerchiefs, a separate insert with round hole. I often used one of my inserts for weeks then must switch to another size only to repeat this over again due to pain & blisters. Help!