Jalapenos are a hot variety of chile pepper, classified at 2,500 to 5,000 Scoville units. Scoville units measure the heat of chile peppers and range from zero to 500,000. Capsaicin, or chile oil, is what gives jalapenos and other chile peppers their heat and is found on the inner central membrane of the pepper. Eating or working with jalapenos can cause a severe burning sensation on the skin or inside the mouth. It is possible to find relief from a jalapeno burn in a number of ways, including application of milk, lemon juice and cold compresses.
Taking the sting out of a jalapeno burn on your skin or in your mouth is as simple as drinking milk or rubbing it on the burn. According to General Chemistry Online, milk contains casein, a phosphoprotein that removes the capsaicin from nerve receptor binding sites in the mouth. Applying milk to the skin is just as effective since casein acts almost as a detergent to capsaicin molecules. The casein in milk accounts for approximately 3 percent of milk. Milk chocolate and some beans and nuts also contain casein, but there is no anecdotal or scientific evidence to suggest these may help decrease the pain of a jalapeno burn.
Skinverse.com says a burn on the skin or in the mouth from a jalapeno can be counteracted by the application of lemon or lime juice. The citric acid in lemon and lime juice neutralizes the jalapeno's alkaline in the capsaicin. Use the juice as a mouth wash or swab the affected skin to reduce the pain.
While capsaicin is insoluble in cold water, the application of cold compresses to the burnt area can still bring relief by numbing the area. If the eye is affected by either getting jalapeno juice in the area or rubbing the eye with burnt hands, flush the eye immediately with water.