Actinic keratoses that develop on the lips are referred to as actinic cheilitis. The clinical appearance of an actinic keratosis is that of a small (several millimeters), red scaly papule or plaque, with induration and thickening of the epidermis. There may be associated erythema.
Blood Clots. A blood clot needs to be considered as a cause of calf pain, especially when the calf pain is not the immediate result of an injury. Blood clots can form is the deep veins of the leg, causing a blockage in circulation. This may cause swelling and pain in the calf.
Some of the more common causes include: 1  Calf Muscle Strain: This is the most common cause of acute onset calf pain. Usually, this injury occurs during a sports or exercise activity. 2  Medial Gastrocnemius Strain: The medial gastrocnemius is the part of the calf muscle most commonly injured.