Description
What Is Magnesium Sulphate Paste & What Is It Used For?
Magnesium Sulphate Paste is a traditional drawing ointment applied to the skin to support the management of boils, carbuncles, and localised skin inflammation. The formulation contains magnesium sulphate and glycerol, which work together to draw moisture from the skin surface through a strong osmotic action.
It is used to help soften and draw out moisture from inflamed areas, supporting the natural healing process. The paste must only be applied to intact, unbroken skin.
More information on boils and skin infections – https://www.nhs.uk/conditions/boils/
About Boils and Carbuncles
Boils are painful, pus-filled bumps caused by bacterial infection of a hair follicle. Carbuncles involve clusters of boils that form a connected area of infection under the skin.
Common symptoms include:
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Red, swollen skin
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Localised tenderness
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A central pus-filled core
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Warmth over the affected area
Magnesium Sulphate Paste is traditionally used to help draw moisture to the skin surface, which may support the body’s natural drainage process.
Some boils and all suspected abscesses may require medical assessment – especially if severe, persistent, or accompanied by fever.
Magnesium Sulphate Paste Benefits
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Helps draw moisture from boils and carbuncles
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Traditional osmotic paste formulation
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Easy to apply and suitable for intact skin
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Useful as part of a first aid toolkit
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Can support softening of inflamed areas
Directions for Use / How to Apply
How to Use Magnesium Sulphate Paste
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Stir the paste well before use.
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Apply a liberal layer of paste to the affected intact skin.
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Cover with a clean, breathable dressing.
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Reapply as directed on the packaging, typically once or twice daily.
Important Usage Notes
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Do not use on broken skin unless instructed by a healthcare professional.
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If the skin becomes increasingly painful, swollen, or does not improve, seek medical advice.
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Do not apply near the eyes, mouth, or mucous membranes.
Magnesium Sulphate Paste Ingredients
Active Ingredient
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Magnesium sulphate (dried)
Other Ingredients
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Glycerol (helps retain moisture)
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Other stabilisers depending on manufacturer
Safety Information / Warnings
Do not use Magnesium Sulphate Paste:
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If you are allergic to magnesium sulphate or any listed ingredients
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On broken, open, or infected wounds unless advised
Speak to a healthcare professional if:
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You suspect an abscess rather than a simple boil
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The boil is very large, extremely painful, or accompanied by fever
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You have a weakened immune system or diabetes
Storage
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Store below 25°C
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Keep out of sight and reach of children
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Return unused product to a pharmacy for safe disposal
Side Effects
Side effects are rare but may include:
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Mild skin irritation
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Redness or itching due to sensitivity
Stop using and seek advice if irritation persists or worsens.
Frequently Asked Questions
What is Magnesium Sulphate Paste used for?
It is used to draw moisture from boils, carbuncles, and inflamed skin areas on intact skin.
How does Magnesium Sulphate Paste work?
Magnesium sulphate has a strong osmotic effect that pulls moisture toward the skin surface, helping soften inflamed areas.
Can it be used on open wounds?
No. Only apply to intact skin unless specifically advised by a clinician.
Does Magnesium Sulphate Paste help with abscesses?
Some abscesses require antibiotics or drainage. Seek medical advice before use if you suspect an abscess.
Can it remove splinters?
It may help bring superficial splinters to the skin surface, but tweezers are usually first-line.
How long does Magnesium Sulphate Paste take to work?
You may feel a slight pulling sensation shortly after application; improvement varies based on the size of the boil.
Can children use Magnesium Sulphate Paste?
Yes, when used on intact skin and following packaging guidance.

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