People with polycythemia vera (PV) often notice their symptoms worsen with extreme temperatures. Itching, a common PV symptom, can intensify in both hot and cold weather. This condition, known as pruritus, frequently occurs after exposure to warm water, a phenomenon called aquagenic pruritus. Each patient’s experience with PV is unique, but many report heightened sensitivity to temperature changes, particularly when it comes to itching. This symptom can be especially frustrating, as it often follows activities like hot showers or baths, making daily routines challenging.
Hot, humid conditions may trigger itching, while cold, dry air can exacerbate it by drying the skin. Heat can also aggravate other PV symptoms. Some patients experience erythromelalgia, a burning sensation in the hands or feet that worsens in hot weather. Additionally, heat increases dehydration risk, a concern for PV patients already prone to blood clots. The burning pain associated with erythromelalgia is often accompanied by redness and warmth, making it a distinct and uncomfortable symptom. Dehydration in hot weather further complicates matters, as it can thicken the blood, increasing the risk of clotting in individuals already vulnerable due to PV.
Managing these symptoms involves simple measures. Lukewarm showers, gentle skin drying, and moisturizing can help. During hot weather, staying hydrated, limiting outdoor activities during peak heat, and using air conditioning are recommended. In cold weather, wearing layers and protecting hands and feet is advisable. Patting the skin dry instead of rubbing can reduce irritation, and choosing fragrance-free moisturizers can prevent further skin sensitivity. Layering clothing allows for better temperature regulation, while gloves and warm socks protect extremities from cold-induced dryness.
If weather-related symptom changes occur, consulting a healthcare team is essential. They may suggest medications for itching or adjust PV treatments, as some therapies for blood count control can also alleviate symptoms. Organizations like the MPN Research Foundation, MPN Advocacy & Education International, and The Leukemia & Lymphoma Society offer reliable patient education resources. Healthcare providers may prescribe antihistamines or topical creams to manage itching, while adjusting PV medications like JAK2 inhibitors can address both blood counts and symptoms simultaneously.
Tracking how symptoms respond to temperature changes and discussing these patterns with healthcare providers can improve comfort year-round. This proactive approach allows for tailored strategies to manage PV symptoms effectively. Dr. Gabriela Hobbs, Clinical Director of the Leukemia Service at Massachusetts General Hospital, emphasizes the importance of patient-provider communication in managing MPNs like PV. Her research focuses on advancing care through clinical trials and translational collaborations, aiming to improve outcomes for patients with these conditions. Send your questions about PV to [email protected].© 2026 HealthCentral LLC. All rights reserved.