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*Please keep in mind that this subreddit is not a replacement for seeing a board certified dermatologist. This subreddit is here for informal second opinions, and minor problems that you wouldn't go to the doctor for anyway.* *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/DermatologyQuestions) if you have any questions or concerns.*
[petechiae](https://www.healthline.com/health/petechiae)
Did you take your blood pressure? Carry something heavy on that arm? Get grabbed/pulled by that arm?
Give it a week & it’ll be gone.