The first time I did a lot of walking, more than 10-15 minute, my deep cut did the same. I did take Tylenol, and the pain eased. I also had my mom look at it to see if it was red or oozing. It wasn’t, but if it had been or if the pain continued, I would have called my program. To be safe you should call the nurse. Better to know for sure you’re okay than to suffer in silence.