Doctor Warns of Three Behaviors Worsening Joint Inflammation

Doctors are warning that three common behaviors during hot weather can aggravate arthritis symptoms, particularly among office workers. While people often focus on heatstroke and skin problems in summer, they often overlook how knee pain and swelling can gradually worsen. Clinics have recently seen more patients presenting with swollen, painful knees and limited mobility.

The combination of hot, humid weather with certain lifestyle habits—prolonged time in air-conditioned rooms, excessive consumption of cold or sugary treats, and high-sugar beverages—can intensify discomfort for those with existing degenerative joint disease or chronic inflammation.

According to Traditional Chinese Medicine doctor Song Wanzhen, humidity in Chinese medicine is characterized as heavy, murky, and sticky. Pathogenic dampness can affect joints and muscles. When external humidity is high and the body's metabolism and water balance are disrupted, conditions known as "damp-heat" or "damp-cold" can develop, causing knee swelling, soreness, heaviness, and limited movement.

People who spend extended periods in air-conditioned offices during summer face particular risk. Large temperature differences between indoors and outdoors, combined with direct exposure to cold air conditioning on the knees, can worsen localized discomfort. Beyond air-conditioning, cold desserts popular in summer are another concern. Many shaved ice drinks contain syrup, condensed milk, jam, tapioca pearls, and pudding—all high in sugar. Excessive refined sugar consumption over time not only causes weight gain but also promotes chronic inflammation, making it important for those with knee pain or degenerative knees to limit frequency and portion sizes.

During summer, many people wear shorts or short skirts. Sitting in air-conditioned rooms for long periods in a fixed position without movement can cause muscles around the knees to remain tense for extended periods. Combined with insufficient physical activity, this can easily lead to stiffness and soreness when standing.

Doctor Song recommends that office workers exposed to air-conditioning for more than eight hours daily should avoid remaining in one position for long periods and should move their bodies appropriately at regular intervals.

Clinically, beyond osteoarthritis patients, those who are obese, elderly, have suffered previous injuries to knee ligaments or cartilage, and those who exercise regularly such as running, hiking, or playing sports should all be cautious about stress on the knees.

If knee swelling and pain persist for more than one week or begin affecting daily activities like climbing stairs or walking, professional evaluation should be sought promptly. Self-treatment with patches or attempting to tolerate pain is not recommended.

Doctor Song emphasizes that summer threats extend beyond heatstroke. If knees repeatedly swell and ache, with morning stiffness, limited mobility, or gradually worsening pain, one should not simply attribute it to hot or humid weather. Professional medical evaluation and treatment, combined with lifestyle modifications, should be pursued promptly.