Understanding their physiological effects and proper use can help determine when they’re most beneficial for colds
For many, the word “mustard plaster” brings back childhood memories: the smell of dry mustard, a warming pad on the back, and the comforting hands of a parent. When the medicine cabinet was empty, mustard plasters were the go-to remedy for colds — time-tested and simple. Today, such methods are gaining renewed interest as part of a gentle, natural approach to early cold symptoms, cough, and situations where otc medication for sore throat has been used repeatedly.
Though considered an old-fashioned remedy, mustard plasters have a well-understood mechanism of action. Modern versions are convenient and safe for home use. Understanding their physiological effects and proper use can help determine when they’re most beneficial for colds.
Made from black or brown mustard seed powder inside a paper or fabric envelope, mustard plasters release allyl mustard oil when moistened with warm water. This compound irritates skin receptors, causing blood vessels to dilate and drawing blood to the application site.

This warming and irritating effect is used in reflex therapy: stimulating certain zones can activate the immune system, improve circulation to internal organs, and assist in toxin elimination. During colds, this may ease breathing, reduce bronchial spasms, and lower inflammation.
Some publications, including in Complementary Therapies in Medicine, note that external warming procedures like plasters and compresses can offer subjective relief from early-stage colds. The effect is comparable to placebo, but when used properly, mustard plasters pose minimal risk and can provide noticeable improvement after the first use.
They can also complement otc cold medicine, supporting faster recovery and improving overall well-being.
Traditionally used to stimulate circulation and cause localized hyperemia (increased blood flow), mustard plasters activate skin receptors and encourage oxygen and immune cells to reach inflamed areas faster.
This explains their benefit in managing respiratory symptoms, especially as supportive care for:
Typical application zones include the chest (avoiding the heart), the back over the lungs, and the calves or soles. The latter, known as the “mustard sock” method, is often used in children or when chest placement is not possible. This folk remedy is widely practiced, though not confirmed by clinical trials, and should be avoided on sensitive skin.

Sessions last 5 to 15 minutes depending on age and skin sensitivity. If strong burning or redness occurs, remove immediately to avoid skin damage.
After the procedure, rest under a warm blanket to enhance the warming effect, improve bronchial drainage, and reduce coughing.
Keep in mind:
Used wisely, mustard plasters can support immune and respiratory function. When combined with other otc medication for colds, they may help ease symptoms and speed recovery.
Modern mustard plasters are safer and easier to use than homemade ones, eliminating the need for mixing or worrying about clumps and burns. Still, precautions are essential.
Important points to follow:
Do not use mustard plasters:
Always consult a healthcare professional before starting treatment and consider additional OTC-products as needed.
You can order mustard plasters from USA Apteka with fast delivery across the U.S. and beyond. Each pack is safe, ready to use, and convenient for home treatment.
We also offer emergency first aid supplies, herbal syrups, supplements, and vitamins. Free U.S. shipping is available on orders over $59. Orders placed before 3 PM (weekdays) ship the same day.
Mustard plasters are not just a thing of the past — they are a simple, time-tested way to support healing.
Understanding their physiological effects and proper use can help determine when they’re most beneficial for colds
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