Dubai's daily heat swings leave residents drained, skin irritated

For many Dubai residents, a single summer day means moving between two climates. You step out of a sharply chilled office or car into heat and humidity intense enough to make sweat useless within minutes. Doctors say that constant swing, repeated daily, takes a quiet toll on the body and the skin, leaving people dehydrated, fatigued and dealing with irritation they often cannot explain.

Dr Negin Hakim, a Family Medicine Consultant, describes what happens the moment someone walks into extreme heat. Blood vessels near the skin widen to release heat, the heart works harder, and sweating begins. In Dubai’s humidity, that sweat does not evaporate easily, so the body’s cooling system becomes less effective just when it is needed most.

Walking back indoors does not end the strain; it simply changes it. Strong air-conditioning removes the need for cooling but brings its own problems. Cold, dry air can irritate the eyes, nose, throat and airways, particularly for people who live with asthma, allergies or sinus problems. Dr Hakim is quick to dispel a common fear, however: moving from hot to cold does not itself cause a cold or flu. “These illnesses are caused by viruses, not by temperature changes themselves,” she said.

The repeated switching can still make people feel unwell. Headaches, fatigue, poor concentration and light-headedness are more likely when someone is dehydrated or has not eaten properly. Heat widens blood vessels while sweating drains fluid and salt, and together these effects can lower blood pressure enough to cause dizziness. Dr Hakim added that large indoor-outdoor temperature differences may contribute to dizziness, dry eyes and throat, nasal congestion, a runny nose and tiredness.

For some residents, the effects are more serious than for others. Dr Somayeh Shamsei, Specialist Internal Medicine at Aster Clinic, JLT, said the strain is more noticeable in older adults, pregnant women, people with diabetes and those with heart conditions. Heat exposure dilates peripheral blood vessels, raises heart rate and mildly lowers blood pressure; stepping into a cold room reverses those changes, which can be problematic for people with pre-existing cardiac issues.

Meanwhile, the skin tells its own version of the story. Dr Maurizio Viel, a Plastic Surgeon, calls Dubai’s summer two climates in one day. Outdoors, heat pushes up sweating and oil production. Indoors, air-conditioning strips moisture from the air, pulling water from the skin’s surface. The result, he said, is a common summer paradox: skin that is oily and dehydrated at the same time. Patients often make it worse by reaching for harsh cleansers and acids, which damage the skin barrier further and can trigger even more oil production.

Residents may notice tightness after showering, flaking around the nose and mouth, redness, breakouts, heat rash, puffiness and makeup that no longer sits smoothly. Most of these changes are temporary and can improve within weeks with gentler skincare and better hydration. The more lasting worry is cumulative sun and heat exposure: UV and heat can contribute over time to pigmentation, collagen breakdown, fine lines and loss of firmness, and people prone to melasma or post-inflammatory pigmentation may find symptoms worsen during the hottest months.

The advice from doctors is practical. Keep indoor temperatures comfortable rather than excessively cold, avoid sitting directly under air vents, and drink water regularly throughout the day, even indoors. Before heading outside, take a moment to adjust, avoid rushing into strenuous activity and limit time outdoors during peak heat where possible. Hats, sunglasses, shade and broad-spectrum SPF 50 sunscreen remain essential, with reapplication every two hours outdoors. For skincare, experts suggest a gentle cleanser, a moisturiser with barrier-supporting ingredients such as ceramides or niacinamide, restraint with strong acids and retinoids during peak summer, and possibly a humidifier in bedrooms or heavily air-conditioned spaces.

Above all, residents should not dismiss persistent dizziness, unusual fatigue, wheezing, ongoing cough or shortness of breath as simple “summer fatigue”. Headache, nausea, heavy sweating, marked weakness or reduced urination after heat exposure may signal dehydration or heat exhaustion, and they deserve attention. As the hottest months stretch ahead, the question for anyone navigating Dubai’s two-climate days is whether the small daily adjustments, from water intake to sunscreen reapplication, will be enough to keep the toll quiet.