Introduction

Winter creates unique conditions that can lead to dehydration in surprising ways.

Cold temperatures cause blood vessels to narrow to preserve core body heat, triggering increased urination—a response known as cold diuresis. This can result in unexpected fluid loss.

Indoor heating further increases risk, as dry air leads to moisture loss through breathing and skin evaporation. Reduced water intake during winter adds to the problem.

Even without sweating, the body continues to lose water through respiration and skin—often without triggering thirst.

Here are five warning signs of dehydration to watch out for:

1. Persistent Dry Skin and Chapped Lips

If your skin feels unusually tight, flaky, or itchy despite using moisturizers, dehydration may be the culprit. Dry, cracked lips are another early red flag that your body is lacking adequate fluids.

2. Dark-Colored or Infrequent Urination

Healthy hydration usually results in pale yellow urine. If your urine appears dark, amber-colored, or you’re urinating less often than usual, your body may be conserving water—an important sign of dehydration.

3. Constant Fatigue or Low Energy

Dehydration reduces blood volume, making it harder for oxygen and nutrients to reach your muscles and brain. This can leave you feeling sluggish, unusually tired, or mentally foggy during the winter months. It could also be associated with muscle cramps.

4. Frequent Headaches or Dizziness

Even mild dehydration can trigger headaches. In more severe cases, you may feel lightheaded or dizzy, especially when standing up quickly—an indication that fluid levels are too low. Both salt and water intake may need to be raised in such cases.

5. Dry Mouth and Increased Thirst (Late Sign)

In winter, thirst signals can be delayed. If you already feel very thirsty or notice a dry, sticky mouth, dehydration may already be significant and needs prompt attention. Other causes such as raised blood sugar should also be considered.

How to Stay Hydrated in Winter

  • Drink water regularly, an easy guide to water intake would be your urine color.
  • Include warm fluids like herbal teas or soups.
  • Eat water-rich foods (fruits, vegetables, broths).
  • Limit excess caffeine and alcohol, which can increase fluid loss

Word of Caution

In patients with kidney or heart related ailments, water & salt intake should be restricted as per the individual’s health.

It is best to consult your physician to ensure the best guidance.
Staying hydrated during winter is just as important as in summer. Listening to your body and maintaining consistent fluid intake can help prevent these symptoms and keep you feeling your best.

Dr Sfurti Mann

Senior Consultant-Internal Medicine

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