Understanding Magnesium Sulphate Glycerin Paste
Magnesium sulphate paste, often referred to as a "drawing salve," is a topical preparation that has been used for various skin ailments for a long time. Its main ingredients are dried magnesium sulphate (Epsom salt) and glycerol, sometimes with a small amount of phenol for antiseptic properties. Typically, the paste contains about 48% dried magnesium sulphate. It has a thick consistency designed for topical application under a dressing.
The Science: How Does It Work?
Magnesium sulphate paste primarily works through osmosis. Dried magnesium sulphate attracts and absorbs water. Applying a thick layer of the paste over a boil or abscess creates a hypertonic environment. This draws fluid, including pus and exudate, from the swollen tissues into the paste and dressing.
The glycerol helps keep the paste moist and contributes to its texture for easy application. This drawing action can reduce swelling and pressure, which may help relieve pain. For boils and abscesses, it can help them come to a "head" and drain faster. For splinters, the osmotic effect can help draw the foreign object towards the skin's surface, making removal easier.
Primary Uses of Magnesium Sulphate Paste
This ointment is used for specific, localized skin issues and should not be used on general wounds or broken skin.
Boils, Carbuncles, and Abscesses
This is a common use, where the paste helps draw out pus from these infected bumps, potentially speeding up healing and relieving pain.
Drawing Out Splinters
For small embedded splinters or thorns, the paste can help draw fluid from the tissue, potentially pushing the object closer to the surface for easier removal. This is particularly useful for difficult-to-grasp splinters.
Infected Spots and Ingrown Hairs
For minor infected spots or inflamed ingrown hairs with a small pustule, the paste can help draw out the infection.
How to Apply Magnesium Sulphate Paste
Effective use requires proper application:
- Stir the Paste: Mix the paste with a clean utensil before use.
- Clean the Area: Wash and dry the affected skin, avoiding use on open wounds.
- Apply Liberally: Apply a thick layer (about 5mm) to the affected area without rubbing it in.
- Cover with a Dressing: Use a non-adhesive dressing and secure it with medical tape.
- Change Regularly: Change the dressing and apply fresh paste every 12 to 24 hours, or as advised.
Comparison with Other Topical Treatments
Magnesium sulphate paste is often compared to ichthammol ointment, another drawing salve.
| Feature | Magnesium Sulphate Paste | Ichthammol Ointment |
|---|---|---|
| Primary Action | Osmotic drawing of fluid and pus | Claimed anti-inflammatory and antibacterial properties |
| Mechanism | Creates a hypertonic gradient | Mechanism as drawing salve has limited evidence |
| Common Uses | Boils, abscesses, drawing out splinters | Traditionally used for boils and skin inflammations |
| Appearance & Odor | White, odorless paste | Dark, thick ointment with a strong tar-like odor |
Precautions and When to See a Doctor
Magnesium sulphate paste is generally safe for topical use but has precautions. Avoid using it on broken skin, large open wounds, or eczema. Do not use if you are allergic to any ingredients. Discontinue use if skin irritation occurs.
Seek medical advice if the condition doesn't improve after a few days, worsens, or shows signs of a more serious infection like fever or spreading redness. For deep or persistent issues, medical attention is necessary.
Conclusion
Mag sulph glycerin paste is a traditional and effective drawing agent. It is primarily used for localized, pus-filled skin infections such as boils and carbuncles, and for removing small splinters. Its action is based on osmosis, helping to draw out moisture and debris, reduce inflammation, and support the body's healing process. It remains a useful item for a home first-aid kit.
Authoritative Link: For more information on boils and carbuncles, you can visit the NHS website.
