The commonest causes for paresthesia are diabetes, hypothyroidism, peripheral vascular disease, vitamin
, neurological causes or malnutrition.
Other possibilities which I can think of are dermatitis skin
and fibromyalgia. But these are usually presenting with other symptoms as well. These include redness, swelling and a rash on skin
and fibromyalgia is characterized by chronic widespread pain and allodynia (a heightened and painful response to pressure).