Hi, can masturbating increase the size of an epididymial cyst? I found out that I had one in December, and I was told by my doc to go get a second ultrasound, which I will do in 1 week, but I have noticed that the cyst has grown in size. Could this be because of masturbation, which I usually do about 4-5 times a week (excessive, I know). Or could it be something else like cancer?