I am using a Ping along with the 6 mm insets. I have not had this problem until today. I started pumping in December. I was changing my set every 3 days as instructed. More recently I have been going 4-5 days. When I removed my inset today it was very sore (it did not feel sore before that). I moved to the other side with my new inset. Now, about 10 hours later, it is very sore and it feels like there is a knot under the skin.
Did I, or am I, leaving the set in too long? Or is this a fluke?
How long do you use your sets? Thanks!