Mustard Plasters for Coughs and Colds: A Look at the Evidence and Risks

For generations, many Indian households have turned to traditional remedies for common ailments like coughs and colds. One such remedy that occasionally surfaces is the mustard plaster. You might have heard elders in the family talk about applying a warm, pungent paste to the chest to ease congestion or a persistent cough. But does this age-old practice actually work, and more importantly, is it safe? Let's explore the science, the stories, and the safety concerns surrounding mustard plasters.

What is a Mustard Plaster?

A mustard plaster, sometimes called a mustard pack, is a home-based treatment. It's traditionally made from mustard seed powder mixed into a paste. This paste is then typically wrapped in a piece of cloth, like cotton squares, and applied to the skin. The most common application site is the chest, believed to help with respiratory issues. However, some people use it on other parts of the body for pain relief.

How is a Mustard Plaster Supposed to Work?

The theory behind the mustard plaster is that the heat generated by the mustard seeds can increase blood circulation and warm the muscles. Proponents suggest this warmth helps to relieve symptoms associated with coughs, colds, congestion, and even certain types of pain, such as joint pain or muscle aches. The active compound in mustard seeds is called sinigrin. When sinigrin comes into contact with water, it breaks down and forms allyl isothiocyanate. This compound is responsible for the characteristic spicy flavour of mustard and, when applied to the skin, can create a warming sensation.

What Does the Science Say?

Despite its long history and anecdotal support, there is a significant lack of scientific evidence to prove that mustard plasters effectively treat coughs, colds, or other illnesses. Rigorous studies demonstrating their efficacy are largely absent. While sinigrin, found in mustard seeds, has shown potential in some laboratory settings for properties like being anticancer, antibacterial, antifungal, antioxidant, and aiding in wound healing, these findings are preliminary and do not directly translate to the effectiveness of a mustard plaster for common respiratory symptoms.

Furthermore, there is no evidence to suggest that mustard plasters can help alleviate symptoms of COVID-19. While some research from 2020 explored sinigrin's potential in treating COVID-19, these were early findings, and more studies are needed to understand its true impact.

How to Make and Use a Mustard Plaster (With Extreme Caution)

If you are considering trying a mustard plaster, it's vital to understand the risks involved. Here’s a general guide, but always proceed with utmost caution:

What You'll Need:

• 2 squares of fabric, approximately 6 x 6 inches each (like cotton handkerchiefs or thin towels)
• 1 tablespoon of mustard powder (ensure it's pure mustard powder, not prepared mustard sauce)
• 1 tablespoon of flour (this helps to dilute the mustard and reduce the risk of burns)
• Warm water

Instructions:

1. In a small bowl, combine the mustard powder and flour. Mix them thoroughly.
2. Gradually add warm water to the mixture, stirring until you achieve a thick, spreadable paste. It should not be too watery.
3. Spread this paste evenly onto one of the fabric squares, covering most of the surface but leaving a small border around the edges.
4. Place the second fabric square on top of the paste-covered one, creating a layered pack.
5. Crucially, before applying, test the warmth on your inner wrist or elbow. It should feel warm, not hot.
6. Apply the plaster to the affected area (e.g., your chest). Avoid applying it directly onto broken skin, open cuts, wounds, or rashes.
7. Do NOT leave the plaster on for more than 15 minutes. Set a timer.
8. After 15 minutes, carefully remove the plaster.
9. Gently wash the skin with soap and water to remove any residue.
10. Wash your hands thoroughly with soap and water after handling the plaster, and avoid touching your face or eyes.

Potential Risks and Side Effects

The biggest concern with mustard plasters is the risk of skin irritation and burns. The allyl isothiocyanate that is released can be a potent skin irritant. Leaving the plaster on for too long, using too much mustard powder, or applying it to sensitive skin can lead to adverse reactions.

Common side effects include:

• Redness
• Burning sensation
• Skin irritation
• Blisters
• Second-degree burns

There are documented cases of individuals suffering second-degree burns from prolonged or improper use of mustard pastes. For instance, one case study reported a woman developing a second-degree burn after applying a mustard paste to her knee for over 24 hours. Another individual experienced similar burns after mixing mustard powder with honey and water for a paste.

It is critical to remove the mustard plaster after 15 minutes. Leaving it on for too long significantly increases the risk of severe skin damage.

When to Avoid Mustard Plasters

You should avoid using mustard plasters if:

• You have sensitive skin.
• You have any open wounds, cuts, or sores on the skin where you intend to apply it.
• You are allergic to mustard or any of its components.
• You are treating an infant, young child, or an elderly person with fragile skin.
• You have diabetes or any condition that affects circulation or skin sensitivity.

Safer Alternatives for Coughs and Colds

Given the lack of proven benefits and the significant risks, it's wise to consider safer and more evidence-based approaches for managing coughs and colds. Your doctor can provide the best advice, but here are some generally recommended strategies:

For Congestion and Cough:

• Stay Hydrated: Drink plenty of fluids like water, herbal teas (like ginger or tulsi), and clear soups. This helps thin mucus, making it easier to cough up.
• Gargle with Saltwater: Mix half a teaspoon of salt in a glass of warm water and gargle. This can soothe a sore throat and reduce swelling.
• Steam Inhalation: Inhaling steam from a bowl of hot water (carefully!) or a hot shower can help loosen congestion in your nasal passages and chest. You can add a drop of eucalyptus oil if tolerated, but use caution.
• Honey: A spoonful of honey (for adults and children over one year old) can help soothe a cough. It has natural antibacterial properties.
• Rest: Allow your body to recover by getting plenty of rest.

Over-the-Counter (OTC) Medications:

Consult your doctor or pharmacist before taking any medication. For symptom relief, options might include:

• Decongestants
• Cough suppressants or expectorants
• Pain relievers like paracetamol or ibuprofen for fever and aches

When to Consult a Doctor

While most coughs and colds resolve on their own, it's important to seek medical attention if you experience any of the following:

• Symptoms that worsen or don't improve after a week or two.
• High fever (above 102°F or 39°C).
• Difficulty breathing or shortness of breath.
• Chest pain.
• Coughing up thick, coloured mucus or blood.
• Pre-existing chronic health conditions (like asthma, COPD, heart disease, or diabetes) that are aggravated by the illness.

A doctor can accurately diagnose your condition and recommend the most appropriate treatment plan, ensuring your safety and effective recovery.

The Bottom Line

While the idea of a natural, warming remedy like a mustard plaster might seem appealing, especially for persistent coughs and colds, the lack of scientific backing and the real risk of skin burns mean it's generally not recommended. Prioritizing evidence-based treatments and consulting with healthcare professionals ensures you receive safe and effective care. Focus on hydration, rest, and proven symptom relief methods, and don't hesitate to seek medical advice when your symptoms are severe or concerning.

Frequently Asked Questions (FAQs)

Q1: Is a mustard plaster safe for children?

No, mustard plasters are generally not recommended for children. Their skin is more sensitive, and the risk of burns and irritation is significantly higher. Always consult a pediatrician for any health concerns regarding children.

Q2: Can mustard plasters help with muscle pain?

While some people use them for muscle pain, the evidence is lacking, and the risk of skin irritation remains. Safer methods like heat pads or topical pain relief creams are generally preferred. If pain persists, consult a doctor.

Q3: What should I do if I get a skin burn from a mustard plaster?

If you experience redness or mild irritation, wash the area with cool water and apply a soothing lotion. If you develop blisters or a severe burn, seek immediate medical attention. Do not break blisters.