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topical · for menstrual cramps

Continuous Low-Level Heat Therapy

Reviewed by the Nimbera editorial team · Last updated May 2026

Strong evidence$10-40

How to use

Apply a heating pad or wearable heat patch (ThermaCare) to your lower abdomen on the first 1-3 days of your period. Use continuously for at least 8-12 hours for best effect. Temperature should be warm, not hot enough to burn.

How it works

Heat relaxes uterine muscle contractions and increases blood flow, reducing ischemia-related pain. An RCT found continuous low-level heat as effective as ibuprofen for dysmenorrhea. Heat plus ibuprofen together was more effective than either alone.

Where to buy

Pharmacies. ThermaCare wearable patches ($10-15) or electric heating pad ($20-40).

Typical cost: $10-40

Safety notes

Do not use heat with topical pain creams containing menthol or capsaicin - combined heat can cause burns. Do not sleep with an electric heating pad.

Drug & supplement interactions

  • Always tell your doctor or pharmacist about any supplements you take.
  • Interactions can occur with prescription medications, blood thinners, and immunosuppressants.
  • Herbal remedies can affect how the body absorbs or metabolises drugs.
  • Check drugs.com interactions checker before starting.

Clinical source

Obstetrics & Gynecology (RCT); ACOG

This information is compiled from primary clinical literature and is for informational purposes only. It is not a substitute for professional medical advice. Read our full disclaimer.