Should You Take a Cold Shower?
Cold showers have become surprisingly popular. Advocates claim they can improve mood, strengthen the immune system, increase energy, help recovery from exercise, and even improve metabolism.
Some of those claims get ahead of the evidence. But brief exposure to cold does produce real physiological responses, and there may be benefits worth exploring.
What Happens When You Get Cold?
Step into cold water and your body reacts immediately. Your breathing quickens, blood vessels near the skin constrict, and your heart rate and blood pressure can rise. The sympathetic nervous system—the body's “fight or flight” system—is activated.
That helps explain one of the most commonly reported effects: feeling more awake and alert afterward.
Cold exposure also affects hormones and neurotransmitters, although that doesn't necessarily mean that a daily cold shower produces lasting health benefits.
What Does the Research Show?
The evidence for cold showers themselves is still fairly limited.
One large randomized study in the Netherlands had people finish their normal showers with 30, 60, or 90 seconds of cold water for a month. Those taking cold showers reported fewer days absent from work because of illness, although they did not report fewer days of actually feeling ill.
Research on cold-water immersion has found possible effects on exercise recovery, stress, and mood, but sitting in an ice bath or swimming in cold water isn't the same as taking a brief cold shower.
Claims that cold showers cause substantial weight loss, “boost immunity,” or prevent disease are not well established.
If You Want to Try It
You don't have to jump into an ice bath.
Take your normal warm shower and finish with 30 seconds of cool or cold water. If that becomes comfortable, gradually increase the time.
There's no prize for making the water painfully cold.
Cold water causes sudden cardiovascular stress, so people with heart disease, heart rhythm problems, poorly controlled blood pressure, or other significant medical conditions should be particularly cautious and discuss cold exposure with their doctor.
Bottom Line
A brief cold shower may leave you feeling awake, refreshed, and energized.
Whether it produces important long-term health benefits is much less certain.
If you enjoy it, a short blast of cold water at the end of your shower is an inexpensive experiment. Just don't expect it to perform miracles.
Learn More
A 2025 systematic review and meta-analysis of randomized studies examining cold showers, cold baths, and other forms of cold-water immersion. Researchers found some possible benefits for stress, sleep, and quality of life, but concluded that the evidence remains limited and that many popular claims about cold exposure have not been established.