Why does heat help relieve cramping from dysmenorrhea?

Dr. Jeanne Morrison, PhD
Family Practitioner
Heat therapy, whether in the form of a hot bath, heating pad, or hot water bottle, can help relieve cramping from dysmenorrhea. When menstruation occurs, the uterus contracts to shed its lining. Prolonged contraction of the uterine muscles can sometimes cause painful cramping. Heat therapy works by relaxing the muscles of the uterus, increasing blood flow, easing pain and dysmenorrhea symptoms.

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