Chronic Spontaneous Urticaria (CSU): looks like an allergy, but it isn’t
CSU is the medical term for chronic hives that last for six weeks or longer, where the underlying cause is internal rather than exposure to any allergen or external trigger.1-3 CSU is an immune-related condition but may be mistaken for an allergic reaction, making it difficult to diagnose and manage.4-6
Living with CSU
Approximately 1.7 million people in the US live with the unpredictable onset of symptoms associated with CSU, which can include long-lasting hives, itching, and deep tissue swelling (angioedema).3,7 People may experience burning, stinging, and sometimes pain on the skin where hives occur. Also, in those that experience angioedema, it may affect body areas such as lips, eyes, cheeks and extremities and is associated with numbness/tingling. These symptoms can have a severe impact on daily life.