yes, my sister has this skin irritation that keeps re-ocurring. she said she was lying in bed and felt something bite her on the arm. the next day she had about three bites that looked like mosquito bites; however the bites spread to her other arm and her leg. she went to the doctor because they areas were very itchy and didn t seem to be going away. they gave her antibiotic, steroid shot and benodryl. the areas cleared up leaving dark spots, but now they have returned. this has now been a month and it is happening again. the doctor checked her blood and found nothing and now they are sending her to a dermotologist. what could this possbily be?