Why does deep heat burn the area you apply it to on your body - eg knee or shoulder but doesnt hands?

Deep heat does burn the area you apply it to on your body, regardless of whether it's your knee, shoulder, or hands. The difference is that the skin on your hands is thicker and more resistant to heat than the skin on other parts of your body, so it takes longer for deep heat to cause a burn.

Deep heat products work by increasing the temperature of the skin and underlying tissues, which can help to relieve pain, inflammation, and muscle spasms. However, if the heat is too high or applied for too long, it can damage the skin and cause a burn.

The severity of a deep heat burn depends on a number of factors, including the temperature of the heat, the length of time it is applied, and the thickness of the skin. Mild burns may cause redness, swelling, and pain. More severe burns can cause blistering, scarring, and even infection.

If you are using a deep heat product, be sure to read the instructions carefully and follow the directions for use. If you experience any pain or discomfort, stop using the product and contact your doctor.