The exact cause of pustular psoriasis is not fully understood, but it is usually related to a combination of genetic factors, immune system abnormalities, and external triggers. Patients are advised to seek medical attention promptly and to avoid triggering factors in their daily lives.

Specifically, it is mainly related to the following aspects:

1. Genetic factors: Some patients have a family history of the disease, indicating that a genetic background may increase the risk of developing the disease.
2. Immune system problems: Abnormal immune response in the body, which mistakenly attacks skin cells, leading to inflammation and pustules.
3. External triggers: Certain situations may trigger or worsen the condition, such as infection, mental stress, skin trauma, or sudden discontinuation of certain medications.
To manage your condition, it is recommended that you first visit a reputable hospital's dermatology department for a professional diagnosis. In daily life, please keep your skin clean and moisturized, avoid scratching and sun exposure; learn to regulate your emotions and reduce mental stress; and strictly follow your doctor's instructions regarding medication, and never adjust your treatment plan on your own.