When I went snorkeling on Wednesday, I had a too large pair of fins to begin...they gave me blisters on 3 toes on one foot and one on the other. I traded them in for smaller ones, but the damage was done. They really hurt. But,.....on Thursday, I went snorkeling again and further agrivated the open blisters. Then from Friday through Sunday I work socks and sneakers so as to not irritate them with sandals. I did my treadmill yesterday and today. Yesterday, no pain. This morning they were sore but I did it anyway. Then, as the morning went on today, one of the toes started to turn red and swell...I got a lowgrade fever. DARN IT! So, I went to the doctor and am now on antibiotic and am supposed to keep the foot up. No treadmill until it is healed up. I wonder how long that will be...........