About a month ago I noticed several jagged, red lines on my upper - left arm. I figured they were due to over-exertion or something (although there was no pain) and that they would go away. Fast-forward to yesterday and I noticed more of them in my genital area in the shower. There is no "bulge", if anything the skin is just barely recessed, and they are no more than .25 inches wide (8-10 total lines on my arm).
I have been normally healthy, if a bit overweight (I am a shot putter, but it's not on my throwing arm). Is this something I should be worried about? Any similar experiences or suggestions?
PS - I've been trying to find a picture on google images or something that matches this, but have had no luck so far.
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Is it sensitive skin or something else?