A burn is an injury to skin, or other tissues, caused by heat, cold, electricity, chemicals, friction, or ultraviolet radiation (such as sunburn).[5][9] Most burns are due to heat from hot liquids (called scalding), solids, or fire.[10] Burns occur mainly in the home or the workplace. In the home, risks are associated with domestic kitchens, including stoves, flames, and hot liquids.[6] In the workplace, risks are associated with fire and chemical and electric burns.[6] Alcoholism and smoking are other risk factors.[6] Burns can also occur as a result of self-harm or violence between people (assault).[6]