Have you seen people on social media jumping into icy lakes or ending their showers with cold water? This practice is called cold water therapy, and it has become a popular wellness trend. But before you try it, it’s important to understand both the possible benefits and the risks.

What Is Cold Water Therapy?

Cold water therapy means exposing your body to cold water. This can be as simple as taking a cold shower or as intense as a polar plunge, where you fully immerse yourself in very cold water.

What Are the Possible Benefits?

Many people say they feel refreshed and energized after cold water exposure. Some studies suggest it may offer several benefits:

• Improves mood and alertness – Cold water can help you feel more awake and focused.
• Supports healthy circulation – Blood vessels tighten in the cold and expand again as your body warms up.
• May reduce muscle soreness – Athletes sometimes use ice baths or cold plunges after hard workouts to help with soreness and swelling.
• Could help support the immune system – Some research suggests regular cold water exposure may be linked to fewer sick days.
• May slightly increase calorie burning – Your body works harder to stay warm, which can temporarily boost your metabolism.

Know the Risks

Cold water therapy is not safe for everyone. Risks include:

• Cold shock response – Sudden exposure to cold water can cause gasping, rapid breathing, and a quick rise in heart rate and blood pressure.
• Heart-related risks – People with heart disease, high blood pressure, or a history of stroke should be especially careful.
• Hypothermia – Staying in cold water too long can lower your body temperature to dangerous levels.
• Breathing problems – Cold water can trigger breathing difficulties in people with asthma or other lung conditions.

Should You Try It?

Talk to your healthcare provider before trying cold water therapy, especially if you:

• Have heart disease or high blood pressure.
• Have asthma or another lung condition.
• Have circulation problems, such as Raynaud’s disease.
• Have diabetes.
• Have severe anxiety or panic disorders.
• Are pregnant.
• Take medications, especially blood pressure medicine.

Tips for Staying Safe

If your healthcare provider says cold water therapy is appropriate for you:

• Start with short, cool showers before trying a cold plunge.
• Never do a cold plunge alone.
• Begin with warmer temperatures and shorter times in the water.
• Get out right away if you feel chest pain, confusion, severe shivering, or trouble breathing.
• At first, keep your face out of the water.
• Never jump or dive into cold water.

The Bottom Line

Cold water therapy may offer benefits for some people, but it also comes with real risks. It is best considered for younger and healthier adults. Research is still ongoing, and what works for one person may not be safe for another. Before trying cold showers or polar plunges, talk with your healthcare provider, listen to your body, and take it slow.