Epsom salt, also known as magnesium sulfate, has been used for centuries as a natural remedy for many health concerns. From soothing sore muscles in a warm bath to helping manage skin irritation and even being taken orally for constipation, this mineral compound remains a household favorite.

But is it really safe and effective? Let’s explore the science-backed benefits, possible side effects, and the right way to use Epsom salt.

What Are The Benefits Of Epsom Salt?

Helps Heal Minor Cuts And Bruises

The FDA has approved Epsom salt for soaking minor cuts, bruises, and scrapes. Magnesium-rich salts can strengthen the skin’s barrier, reduce roughness, and ease inflammation. If you enjoy warm soaks, adding Epsom salt is a low-risk way to support healing.

Reduces Psoriasis Symptoms

Epsom salts may also help people living with psoriasis, a condition that causes scaly, inflamed patches on the skin. A short bath soak (around 15 minutes) can soften scales and ease itching. However, over-soaking may irritate the skin, so moderation is key.

Raises Magnesium Levels

Magnesium is vital for over 300 biochemical reactions in your body, including:

  • Supporting healthy nerve and muscle function

  • Regulating heartbeat and blood pressure

  • Strengthening bones and boosting immunity

  • Potentially improving sleep quality

For people with low magnesium levels, oral magnesium sulfate or medical injections can help raise them.

Relieves Pain

Magnesium in Epsom salt may block excessive calcium from entering cells—reducing pain hypersensitivity. While more studies are needed, many people report less soreness and muscle tension after soaking in an Epsom salt bath.

Possible Side Effects Of Epsom Salt

Epsom salt is generally safe when used in baths or foot soaks. However, oral use should be approached carefully.

Milder side effects may include:

  • Nausea

  • Bloating

  • Diarrhea

  • Stomach cramps

Serious side effects (seek medical help immediately):

  • Irregular heartbeat (arrhythmia)

  • Dizziness or fainting

  • Confusion or seizures

  • Severe vomiting

Pregnant women, people with kidney problems, or those taking medications should consult a doctor before using oral magnesium sulfate.

How To Take An Epsom Salt Bath

Soaking in warm water with Epsom salt is one of the most common uses. It may:

  • Reduce swelling (edema)

  • Calm irritated skin

  • Relax sore muscles

  • Relieve stress

Steps for an Epsom salt bath:

  1. Fill your tub with warm water.

  2. Add 2 cups of Epsom salt.

  3. Soak the affected area for 15–20 minutes.

For a foot soak, reduce the amount to ½ cup of salt per basin of warm water.

Other Uses Of Epsom Salt

Beyond baths, Epsom salt is also used in medicine:

  • As part of anesthetic drugs in surgeries

  • As a calcium channel blocker to lower blood pressure

  • In drugs to prevent seizures

  • To slow or stop contractions in pre-term labor

When buying magnesium supplements, choose brands tested by NSF, USP, or ConsumerLab for purity and safety since supplements aren’t FDA-regulated.

A Quick Review

Epsom salt has multiple uses, from relieving pain and soothing the skin to boosting magnesium levels. The FDA recognizes it as generally safe, but oral use can sometimes cause side effects like diarrhea or, in rare cases, more serious complications.

Soaking in an Epsom salt bath remains the safest, most relaxing way to enjoy its benefits. If you have underlying health conditions or are pregnant, always consult your doctor before using it.