Feeling Sick After Just 10 Minutes In The Sun? Expert Explains Why

Stepping into the harsh summer sun often makes us feel sick and completely drained, even after just a few minutes of exposure. Have you wondered why we feel dizzy and nauseous in the sun and how we can protect ourselves? This article will explain it to you.

To understand this better, we reached out to Dr Pooja Pillai, Consultant, Internal Medicine, Aster CMI Hospital, Bangalore.

Why 10 Minutes in the Sun Makes You Dizzy and Nauseous?

Dr Pillai says feeling dizzy and nauseous after walking in the sun for just 10 minutes can happen when the body struggles to cope with heat. “This is especially common during very hot and humid weather, when the body's cooling system has to work harder to maintain a normal temperature,” she adds.

The expert continues, “When you walk in the sun, your body loses water and salts through sweating. If you are already slightly dehydrated or have not consumed enough fluids, even a short period of heat exposure can lead to symptoms such as dizziness, nausea, weakness, headache, and fatigue. Dehydration reduces blood volume, making it harder for the heart to pump blood efficiently to the brain and other organs.”

How Heat Causes Dizziness 

Dr Pillai says that heat also causes blood vessels near the skin to widen so that excess body heat can escape. 

The expert continues, “While this helps cool the body, it can sometimes lower blood pressure temporarily. Reduced blood flow to the brain may make you feel lightheaded or dizzy. People who are not accustomed to hot weather, older adults, children, and those with certain medical conditions may be more sensitive to heat. Wearing heavy clothing, skipping meals, exercising in the sun, or spending time outdoors during peak afternoon hours can increase the risk of feeling unwell.”

How Heat Causes Nausea

Dr Pillai shares that nausea can occur because heat places stress on the body. 

The expert explains, “As body temperature rises, the digestive system may slow down, and the body directs more blood toward the skin for cooling. This can contribute to feelings of stomach discomfort or nausea. In some cases, these symptoms may be early warning signs of heat exhaustion, a condition caused by excessive heat exposure.” 

Tips To Prevent Dizziness and Nausea in The Sun

Dr Pillai shares these tips to prevent dizziness and nausea when exposed to sun: 

• Drink enough water throughout the day.
• Wear light and breathable clothing.
• Use a hat or umbrella.
• Avoid prolonged exposure to direct sunlight during the hottest part of the day. 

“If these symptoms occur frequently, even with mild heat exposure, it is advisable to consult a healthcare professional to rule out underlying health conditions such as low blood pressure, anaemia, or other medical issues. If symptoms worsen or are accompanied by heavy sweating, muscle cramps, confusion, rapid heartbeat, or fainting, medical attention may be needed,” concludes Dr Pillai.

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Conclusion 

Experiencing rapid dizziness and nausea in the heat is a sign that your body is fighting dehydration and struggling to regulate its core temperature. While staying hydrated and avoiding peak afternoon sun generally resolves the issue, you should consult a doctor if these symptoms are regular.