A specific type of heat therapy may feel better for one person than for another, and it may require some experimentation to figure out which one works best. There are many different manners for heat to be applied to the lower back. Some common options include:
Hot water bottle - tends to stay warm for 20 to 30 minutes.
Electric heating pad - maintains a constant level of heat as long as it is plugged in.
Heated gel packs - may be microwaved, or sometimes heated in water, and tend to say warm for about 30 minutes. Certain types of gel packs provide moist heat, which some people prefer.
Heat wraps - wraps around the lower back and waist and may be worn against the skin under clothing, providing convenience and several hours of low level of heat application.
Read more: Heat Wrap Therapy Can Reduce Post-Exercise Low Back Pain
Hot bath, hot tub, sauna, steam bath - tend to stimulate general feelings of comfort and relaxation that may help reduce muscle spasm and pain. A whirlpool jet directed at the lower back may provide the added benefit of a light massage.