i am 51 years old and within the last 3 days i have been getting some kind of bug bites on my body, on my arms, my back, and both of my legs. the itching is unbearable, and i haven't seen a bug jet, but it feels like something is crawling under my skin and then i feel these like picking bites. And then the bite marks spread into like lesions forms, it's driving me nuts. I have never in my life had anything like this before. Please tell me what i should do.