The core of preventing colds in psoriasis patients during winter is to enhance their own immunity + reduce exposure to viruses + avoid triggering skin irritation. Colds can exacerbate inflammatory responses, so comprehensive prevention should start with protection, conditioning, and attention to details.

1. Strengthen immunity: reinforce the body's defensive foundation

Maintain a balanced diet, increase intake of high-quality proteins (lean meat, eggs, soy products), fruits and vegetables rich in vitamin C (oranges, broccoli, kiwifruit), and supplement zinc (nuts, oysters) to provide nutritional support for the immune system.

Engage in moderate exercise, choosing gentle activities such as indoor yoga, brisk walking, or light jogging, 3–4 times per week, about 30 minutes each session, avoiding strenuous exercise that leads to physical fatigue.

Ensure adequate sleep, getting 7–8 hours each night, avoid staying up late so the immune system can fully recover.

2. Reduce virus exposure: block transmission routes

On foggy or cold days reduce going out, avoid crowded public places (shopping malls, subways), and wear a mask when necessary to block droplet transmission.

Develop a habit of frequent handwashing, using soap or hand sanitizer under running water, especially before meals and after using the toilet and after touching public items; avoid rubbing your eyes or touching your mouth and nose with your hands.

Regularly ventilate indoor spaces by opening windows, ventilate twice daily for 15–20 minutes each time to maintain air circulation and reduce viral proliferation.

3. Avoid triggering factors: balance skin and overall body protection

Keep warm, add or remove clothing according to temperature changes, with emphasis on protecting the neck, back, and feet to avoid catching cold; however, do not wear excessively heavy or thick clothing that causes sweating, as sweat irritation may worsen skin lesions.

Maintain indoor humidity at 50%–60%; dry air can reduce the resistance of the respiratory mucosa and also decrease skin dryness discomfort.

Avoid overexertion and mental stress; excessive stress may lead to decreased immunity. Regulate emotions through methods such as listening to music or meditation.

4. Special protection: targeted risk reduction

Avoid close contact with people who have a cold. If a family member has a cold, implement proper isolation (separate meals, wear masks) and regularly disinfect commonly used items.

Do not use immune stimulants without authorization. If you want to use supplements for conditioning, consult a physician first to avoid interactions with psoriasis medications.

If mild prodromal symptoms of a cold occur (e.g., nasal congestion, fatigue), drink plenty of water and rest promptly; if necessary, take mild cold medications under medical guidance to prevent worsening that could trigger psoriasis fluctuation.