Common causes of sores on the hands include burns, exposure to extreme cold weather, spider bites, bedbugs and a forceful pinch of the skin. Other causes include infections such as hand-foot-and-mouth disease and chickenpox, according to WebMD.Continue Reading
Burns caused by heat, chemicals, electricity or radiation cause sores or blisters on the affected area. Blisters on the hand are also caused by working with tools without wearing protective gloves, notes WebMD. Forceful pinches often cause blood blisters due to damage of the tiny blood vessels in the skin.
Hand-foot-and-mouth disease is a mild but contagious virus that is most common among children. Characterizing symptoms of this virus include sores in the mouth and a rash on the hands and feet, explains Mayo Clinic. It is commonly caused by the coxsackievirus A16. It spreads through contact with an infected person's saliva, nasal or throat discharge, fluid from the blisters, or droplets sprayed into the air from coughing or sneezing.
Chickenpox is another contagious infection, caused by a type of herpes virus. Blisters caused by chickenpox start as red bumps that form into blisters and scab over, says WebMD. Chickenpox are at their most contagious starting two or three days before the rash develops up until the point all the blisters scab over.Learn more about Pain & Symptoms