I'm nineteen, weigh 138, and five foot. i woke up tuesday with a itchy spot on my leg thought it was a simple mosquito bite but i thought about it and i had wore my cloths from monday that night. i had pants on so when i thought it might have been a bug i thought it would have been trap in my pant leg and when i changed yesterday it would had fallen out but nothing did. i ignored it but i had scratched around it and maybe once or twice a crossed it subconsciously. when i got back home yesterday afternoon it had turned a really bright red but i thought it was from scratching it that morning but was still shocked it changed so quick. tuesaday night around 5pm or so it had turned black slightly a few hours later i had another black spot growing in side the bump along side the other black spot. i showed it to my grandmother she though it was just scabbing over from scratching it, i had only scratched once that morning i told her and put itch ointment on it right after. when this morning, wensday, the black spots have gotten bigger and darker. i'm thinking it could be from me scratching it through my pants with out me knowing during the night. or my pants pinching it. but it has a hard knot under the bump like a normal itch its about the tip of your pinky to ring finger in size and very itchy. i've been putting itch ointment on it and ignoring it. i haven't scratched it since tuesday morning but its still growing darker.