Why do I shiver after an ice bath?

Author: Althea Kuvalis  |  Last update: Friday, July 18, 2025

Cold blood from your limbs and skin returns to your core where it mixes with warmer blood thereby causing your deep body temperature to drop, even if you're warmly dressed and move into a warm environment. This is why you often only start shivering 10 to 15 minutes after leaving the water.

Is it normal to shiver in an ice bath?

Be aware of the signals your body is sending you. If you're feeling lightheaded or dizzy, experiencing intense shivering or feeling any pain, you should get out of the cold water. These are not normal responses to cold water therapy. Pay attention to how you feel during and after your ice bath.

Why do I feel weird after an ice bath?

This happens because of vasoconstriction--your body lessens blood flow to your extremities in an effort to preserve core body temperature, and that can make you feel lightheaded when you get out of your ice bath.

Can cold water make you shiver?

Sponging with lukewarm water, about 70°F (21.1°C), may help reduce a fever. Cold water may increase the fever as it can trigger chills. Medicines such as acetaminophen, aspirin, or ibuprofen are helpful in fighting a fever and chills.

What not to do after an ice bath?

Post-ice bath, proper aftercare is essential to maximize benefits and prevent adverse effects: Warm Up Gradually: Slowly warm up your body by wrapping yourself in a towel and drinking a warm beverage. Avoid hot showers immediately after, as sudden temperature changes can be stressful.

Benefits of Cold Exposure, Shivering & Brown Fat | Dr. Susanna Søberg & Dr. Andrew Huberman

What should I do immediately after an ice bath?

Slowly Begin the Warm-up Process: Drying Off and Covering Up

To prevent this, take your time to dry off thoroughly and wear warm, comfortable clothing immediately after the ice bath. Wrapping yourself in a cozy towel or robe and wearing dry socks can help retain body heat and initiate a gentle warming process.

Can you overdo ice baths?

Whether this is additional plunges each morning to help you prepare for the day or after an extra hard-fought workout is up to you, just make sure you listen to your body and avoid overdoing it, as excessive use of ice baths may lead to negative effects, such as decreased immune function and increased muscle soreness.

Why am I shivering after a cold shower?

Cold blood from your limbs and skin returns to your core where it mixes with warmer blood thereby causing your deep body temperature to drop, even if you're warmly dressed and move into a warm environment. This is why you often only start shivering 10 to 15 minutes after leaving the water.

Is shivering a side effect of dehydration?

Dehydration can lead to bad breath, dry or flushed skin, and muscle cramps. Other signs of dehydration could include chills and fever, if dehydration is due to heat illness.

What is shivering a symptom of?

Shivering causes your muscles to contract and relax, which warms up your body. Sometimes you might get cold chills from being exposed to low temperatures. Shivering can also be a sign that your body is fighting off an illness, infection or another health problem.

Do ice baths have negatives?

“An ice bath can cause reduction in blood flow to the extremities in peripheral vascular disease; increase in blood pressure in those with high blood pressure and increased risk of hypothermia in patients with impaired ability to regulate body temperature — as may be the case with poorly-controlled diabetes,” said Dr ...

What is ice bath shock?

The cold shock response also increases breathing, heart rate and blood pressure, all of which could pose health risks for people who are susceptible to cardiac events. In addition, when exposed to freezing water and frigid ambient conditions, you can develop hypothermia (dangerously low body temperature) or frostbite.

Why am I sleepy after ice bath?

Regular cold exposure from ice baths can also lead to better sleep. The lowering of body temperature before bedtime can mimic the natural drop in temperature that occurs during sleep, potentially making it easier to fall asleep.

Why do I shiver in water?

Shivering is not a reliable sign of whether a cold swimmer is okay. Shivering is a way that a body can warm itself up: the involuntary muscle movement is your body's natural response to getting colder and trying to warm up.

Should I hot shower after an ice bath?

Avoid immediate hot showers after a cold plunge to prevent negating the benefits of the cold exposure. If you opt for a shower, gradually increase the temperature. Practice safety and mindfulness throughout your cold plunge and warming routine. Be aware of your body's signals and adjust accordingly.

How many seconds should you take an ice bath?

Start With Short Durations. When first starting, staying in an ice bath for no more than 10 minutes at a time is recommended. This short duration helps your body acclimate to the cold temperature. As your body becomes more accustomed to the cold, you can gradually increase the time spent in the ice bath.

What are two warning signs of dehydration?

Symptoms of dehydration in adults and children include:
  • feeling thirsty.
  • dark yellow, strong-smelling pee.
  • peeing less often than usual.
  • feeling dizzy or lightheaded.
  • feeling tired.
  • a dry mouth, lips and tongue.
  • sunken eyes.

Can low electrolytes cause shaking?

Common causes of tremor include benign essential tremor, nervousness, medication side effects, thyroid hormone disorders or abnormal electrolyte levels (potassium, sodium or calcium).

What are the first signs of heat exhaustion?

Possible heat exhaustion symptoms include:
  • Cool, moist skin with goose bumps when in the heat.
  • Heavy sweating.
  • Faintness.
  • Dizziness.
  • Fatigue.
  • Weak, rapid pulse.
  • Low blood pressure upon standing.
  • Muscle cramps.

Should you shiver after an ice bath?

Most people will shiver for a few minutes as their body warms up. However, if you find yourself shivering uncontrollably for longer than 15-20 minutes after getting out of the cold, it might be a sign that your body is struggling to reheat efficiently. In that case, it's essential to take steps to warm up safely.

What not to do after a cold plunge?

After a cold plunge, dry off and warm up by getting dressed in dry clothes. You can sip a warm beverage and move to a heated area. But don't head straight for a sauna or hot tub, because the extreme heat could cause too much stress on your body.

Are ice baths safe?

Cold shock response: Sudden immersion in water under 60 degrees can shock your body and lead to symptoms like rapidly increased breathing, heart rate, and blood pressure. This can increase your risk of drowning if you're in deep water. The effect can also strain the heart.

How to know if an ice bath is too cold?

Exposure to extreme cold can cause frostbite, hypothermia, and other injuries. It's important to avoid temperatures below 50°F (10°C) and to listen to your body. If you experience any pain, discomfort, or numbness, it's best to get out of the ice bath immediately.

Can ice baths go wrong?

Remember: Staying in an ice bath too long can lower your core body temp too much, which is also risky. So, don't go beyond that five-minute limit. “In sports medicine, ice baths are used for marathon runners and others who are experiencing heat injuries,” Dr. King explains.

Do cold plunges burn fat?

Taking a cold plunge in an Ice Barrel can activate the brown adipose and muscles in your body. Once activated, irisin and FGF will be released (irisin and FGF are cold-induced endocrine activators of brown fat function in humans). These two hormones burn up the white fat tissues resulting in weight loss.

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