Why do I need to pee more in the cold?
You're taking a stroll through the park on a cold winter's morning, when it hits you—the need to find a bathroom, and quick! This didn't used to happen in summer.
Is there something about winter that makes us need to pee more?
We study the bladder and lower urinary tract. Here are two main explanations for what's going on.
1. Our lifestyle changes
In summer, we tend to be outside and more active. We sweat more (to lose heat) and it's easy to become dehydrated if we don't drink enough water.
In winter, we're often indoors, around water sources, so we are more likely to be hydrated, less active, and to sweat less. As such, we tend to have more free fluid to excrete via our urine.
2. Our body wants to avoid losing too much heat
If we become cold very quickly, the body protects our internal organs in a number of ways.
Initially, blood is diverted away from the skin to avoid losing its heat to the outside air. This means more blood ends up flushing through your internal organs.
What should I do?
Our diet, age, blood pressure, and personal situation can all impact how much we urinate.
Producing more urine can also be a sign of hypothermia. This is your body responding to the cold as a stressor, so act quickly. Find somewhere away from the cold, and slowly warm up your body.
Keep up the fluids in winter too
If you're out in the cold, you may not feel thirsty. Nonetheless, be sure to drink plenty of fluids during the day. Although it may be tempting to avoid drinking so you don't need to keep rushing to the bathroom, this can lead to dehydration.
If you're often out in the cold in light gear, and you find this increases your urinary output, there can be impacts over the long term.
It does seem like a bit of a balancing game. The key, however, is to avoid stressing your body this way when it's cold. To do this, be sure to dress appropriately and keep warm.
What if you don't notice a difference?
Although the body has mechanisms to make you urinate more in the cold, not everyone notices peeing more in winter.
If you keep warm, there's no reason to think your body would often be "shocked" into responding to cold temperatures.
What about the urine?
It's not just the volume of urine that might be different in winter. The composition can change too.
This means there can be a higher risk of developing kidney stones during winter for people who are susceptible.
So as the weather cools down, be sure to maintain a healthy lifestyle, stay warm, and don't forget to stay hydrated, even when it's cold.