 [ Symptoms ] i have to force myself to eat i havent ate much in a week so far this week i have ate a half bowl of oatmeal two sandwiches and some fries and its thursday my parents are worried i think and so am i i am overweight and 13 so could it be my brain saying hey fatty stop eating any help would be much appreciated thanks [ Disease ] it does seem to be a spider bite but any insect bites can caue such rash if you do not have any systemic effects then there is nothing to worry take anti histamine tablets local creams should help if you get any systemic effects like headache vomitting weakness nausea consult a physician thanks