My skin has been crawling like crazy all over my body. a week ago, i strain a muscle in myarm from lifting weights. what could it be?

Paresthesia: A creepy, crawling sensation in the skin, perhaps with a prickling or burning feeling, is called paresthesia. Sensation is carried to the brain by neurons (nerve cells) running from the outer parts of the body to the spinal cord in bundles called nerves. In the spinal cord, these neurons make connections with other neurons that run up to the brain. Paresthesias are caused by a nerve defect, .