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Why does the face become red and hot when exposed to heat, and how should it be treated?

Oct 17, 2023 Source: Cainiu Health
Dr. Liu Wenmin
Introduction
In general, facial redness and flushing in response to heat may be related to physiological factors, thin stratum corneum, contact dermatitis, rosacea, or cholinergic urticaria. Patients can manage these symptoms by avoiding heat sources and high-temperature environments, applying cold compresses, adjusting lifestyle habits, taking medications, or using topical treatments. If patients experience discomfort, it is recommended to seek timely medical evaluation at a hospital.

Generally, facial redness and warmth upon exposure to heat may be related to factors such as capillary dilation, thin stratum corneum, contact dermatitis, rosacea, or cholinergic urticaria. Treatment options include improving environmental conditions, cold compresses, and medication use. Specific analyses are as follows:

1. Capillary Dilation

When facial skin is exposed to heat, or after consuming spicy or stimulating foods or engaging in physical exercise, the above symptoms may occur due to capillary dilation. This is a normal physiological phenomenon. It is recommended to avoid high-temperature environments as much as possible to reduce episodes of redness and warmth.

2. Thin Stratum Corneum

A particularly thin stratum corneum may lead to visible facial blood vessels (telangiectasia), resulting in the aforementioned symptoms. Applying cold compresses or rinsing the face with cool water is recommended to help relieve vasodilation and lower facial temperature.

3. Contact Dermatitis

If the skin repeatedly comes into contact with certain exogenous substances, redness, swelling, and a burning sensation may develop at the affected site. It is recommended to follow medical advice and apply topical medications such as compound dexamethasone cream, acetic acid prednisolone cream, or dexamethasone acetate cream to alleviate discomfort.

4. Rosacea

Rosacea is a chronic inflammatory skin disorder characterized primarily by episodic flushing and a sensation of heat. Patients may experience the symptoms described above. Under medical guidance, treatments may include calamine lotion, boric acid ointment, or compound methyl salicylate preparations.

5. Cholinergic Urticaria

When facial skin becomes warm, cholinergic nerves may become stimulated and release acetylcholine, potentially causing facial redness and warmth. Patients may follow medical advice to take medications such as compound paracetamol and diphenhydramine tablets, chlorpheniramine maleate tablets, or isotretinoin soft capsules for treatment.

If discomfort persists or worsens, it is advisable to seek timely medical attention at a hospital to prevent delays in diagnosis and treatment.

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