How Heat Helps Pain
When blood flow increases to a particular area of the body, it brings along oxygen and nutrients that can help to speed up the process of healing. Heat helps to relax muscles, which can work to decrease some types of pain sensations. The sensation of heat on the skin also provides something called an analgesic effect: it alters the perception of pain so you don’t hurt as much. The presence of heat on the skin can also be soothing.
How to Use Heat for Pain
Using heat at home can be as simple as plugging in a heating pad, or filling up a water bottle with warm water. In fact, many heating products available on the market don’t even require a plug or water: single-use air-activated heating pads can be worn all day and then thrown away. Some therapy clinics use paraffin wax dips, which, while somewhat messy, can be purchased for use at home. These are usually reserved for hands and feet (it’s physically hard to “dip” your lower back). You can also target many different areas at once with heat therapy by soaking in a warm bath or stepping into a hot tub.
When to Use Heat for Pain
Heat can be used to relieve pain caused by chronic conditions of the muscles and joints. Such chronic conditions include:
Arthritis Old sprains or strains Muscle spasms Muscle stiffness
Because heat has a pain-relieving effect when applied to the skin, it can also be used for other chronic pain conditions as well. In fact, many people in our therapy clinic request heat for nerve pain conditions as well as back pain caused by disk problems. There is little research evidence to suggest that using heat improves these conditions; however, many patients still find the use of heat comforting.
When Not to Use Heat for Pain
While the use of heat can be beneficial for pain treatment, there are also situations when heat should not be used for pain treatment. Heat is best for injuries or conditions that are not in the acute phase. In other words, don’t use heat on a fresh injury: you could increase swelling, which in some cases could increase your overall level of discomfort. In these cases, ice is a better choice. Also, you shouldn’t apply heat to irritated skin or open wounds (including incisions that are still healing). Finally, people with cancer should not use heat to treat pain, as there is a chance of increased tumor growth.
