I am 18 years old. I have itching problem on my whole body. There are no marks or anything else but my body itches. And when I scratch on itching portion there becomes a smal swelling like a mosquito bite. I am having this problem from last three months. My blood reports are also normal. And this swelling also develops if I scratch anywhere on my body. Please tell me a solution to this. I am irritated of all this itchiness.