Winter can be especially hard on those who live with psoriasis. Cold, dry weather can worsen psoriasis, while warm, sunny climates may help alleviate it.Keep your skin well moisturized. Use thick, creamy lotions after showers and baths and throughout the day. Look for lotions and soaps that are fragrance-free and designed for sensitive skin to help reduce irritation.You can also use a humidifier in your home during dry months to help keep your skin moist. Keeping the skin moist can help reduce itching and tenderness.