This may be TMI but has anyone here suffered nipple damage due to pumping? I had a Lansinoh pump that I purchased before…

This may be TMI but has anyone here suffered nipple damage due to pumping? I had a Lansinoh pump that I purchased before I gave birth. Right where the cone turns into a tube there is a ring on the inside. Apparently this ring choked my nipple out and I began noticing that my nipple would swell and stay in a distorted shape which I can only describe as a cherry on the tip of my breast. Obviously I stopped using that pump, and I haven't pumped all together for about 2 weeks, but I just got done pumping with my Medela and the cherry nip is back. It doesn't seem to bother my son, but it's bothering me. Photos in the comments *Nudity... obviously*