

Stretch marks after heavy shrugs
Hello, since I started doing heavy shrugs, I noticed that the day after the workout I sometimes get these purple/red stretch-mark-like lines on my traps/upper back, exactly in the area where the shrugs hit the hardest.
They don’t hurt at all, even when touching them, and in the past they usually disappeared completely after a day or so. This time though they became much more visible than before, which honestly scared me a bit.
Has anyone else experienced this? Is it harmless/normal from heavy shrugs or should I lower the weight or change something?