If you often feel a burst of heat under the calf, there are usually several factors as follows: first, infectious factors, the calf is particularly vulnerable to foot infections, and the foot is prone to contact with bacteria, viruses, fungi and their her pathogenic microorganisms mycoplasma, chlamydia, and thus localized infection cellulitis. Cellulitis will be retrograde according to the blood vessels, will be in the calves infected with dermatitis, infection with dermatitis will often feel a burst of heat in the calves, is a local peripheral infection occurs after the redness, swelling, heat, pain dysfunction typical clinical manifestations. Secondly, peripheral neuritis, especially for patients with previous history of diabetes mellitus, in the presence of diabetes mellitus combined with peripheral neuritis, will often feel the heat flow through the calf or tingling, soreness, swelling, tingling sensation, all belong to the autonomic nerve dysfunction of the calf.