I often have this problem, too. Sometimes the pain of the spasm is so severe that I nearly double-over. I talked to my doctor about it, and she believes the port is probably irritating a nerve. The more active I am, the worse it is. Fortunately, it's not a constant condition. It comes and goes. I might have a week or two with a lot of spasms and pain, and then I'm fine for a month or more. My doctor suggested I take tramadol for a couple of days if it gets bad, and that does actually help. Personally, I don't consider this a health risk - it's an annoyance and an inconvenience.