Scalding is a form of thermal burn resulting from heated fluids such as boiling water or steam. Most scalds are considered first- or second-degree burns, but third-degree burns can result, especially with prolonged contact. The term is from the Latin word calidus, meaning hot. Causes Most scalds result from exposure to high-temperature water, such as tap water in baths and showers, water heaters, or cooking water, or from spilled hot drinks, such as coffee. Scalds can be more severe when steam impinges on the naked skin, because steam can reach higher temperatures than water, and it transfers latent heat by condensation. However, when clothes are soaked with hot water, the heat transfer is often of a longer duration, since the body part cannot be removed from the heat source as quickly. Temperatures The temperature of tap water should not exceed to prevent discomfort and scalding. However, it is necessary to keep warm water at a temperature of to inhibit the growth of legionella bacteria. The American Burn Association states that a scalding injury can occur when skin is placed in contact with water measuring 155 degrees Fahrenheit, or 68 degrees Celsius, for one second. Burn injuries may occur in two seconds, for water measuring 148 degrees Fahrenheit, or 64 degrees Celsius. At 140 degrees Fahrenheit, or 60 degrees Celsius, scalding injuries may occur within five seconds. Scalding injuries can occur within 15 seconds of exposure to water that is 133 degrees Fahrenheit, or 56 degrees Celsius. At 125 degrees Fahrenheit, or 52 degrees Celsius, scalding injuries may occur in 90 seconds. Scalds are more common in children, especially from the accidental spilling of hot liquids. Treatment Applying first aid for scalds is the same as for burns. First, the site of the injury should be removed from the source of heat, to prevent further scalding. If the burn is at least second degree, remove any jewelry or clothing from the site, unless it is already stuck to the skin. Cool the scald for about 20 minutes with cool or lukewarm (not cold) water, such as water from a tap. With second-degree burns, blisters will form, but should never be popped, as it only increases chances of infection. With third-degree burns, it is best to wrap the injury very loosely to keep it clean, and seek expert medical attention. Treatments to avoid Ice should be avoided, as it can do further