By Namita S Kalla | May 17, 2025

Dry skin, stiff muscles, dehydration: 9 health risks of overusing AC

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Because ACs reduce moisture in the  air, your body may lose fluids more quickly through respiration or skin, increasing your need for water intake

Leads to dehydration

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Low humidity and airflow from ACs  can dry out the eyes, causing discomfort, redness, and increased sensitivity

Causes eye irritation

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Studies show that dry, artificially  cooled air can worsen conditions like  eczema or dermatitis by weakening the  skin’s protective barrier

Triggers eczema flare-ups

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ACs can dry out nasal passages, making them less effective at trapping allergens or pollutants, which may result in irritation, sneezing, or mild nosebleeds

Increases sinus dryness

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Cool environments can help sleep, but  overuse of AC may disturb the body’s natural thermoregulation and lead to poor-quality rest

Disrupts your sleep cycle

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Prolonged exposure to cold airflow  can lead to muscle stiffness or tension  in the neck and back

Causes muscle stiffness

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Staying indoors with the AC on all  day limits fresh air and natural light, both  of which support immune function, mood,  and vitamin D production

Reduces natural air exposure

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Dust, mould, or pollen trapped in poorly maintained AC filters can circulate indoors, potentially worsening allergy or asthma symptoms, especially in sensitive people

Worsens allergy symptoms

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Over-reliance on AC can make it harder for the body to adapt to natural temperature shifts, weakening your ability to tolerate heat without discomfort or fatigue

Affects thermoregulation

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