There are specific cases where heat therapy should not be used. If the area in question is either bruised or swollen (or both), it may be better to use cold therapy. Heat therapy also shouldn’t be applied to an area with an open wound.
People with certain conditions should not use heat therapy due to higher risk of burns or complications due to heat application. These conditions include:
If you have heart disease or hypertension, ask your doctor before using heat therapy. If you are pregnant, consult with your doctor before using saunas or hot tubs.