Yes, psoriasis can spread to the whole body, but this doesn't happen to all patients. It is recommended that you see a doctor promptly so that a professional can assess your condition and develop a personalized treatment plan.

Specifically, the extent of disease progression varies from person to person and is mainly influenced by the following factors:

1. **Types and Severity of the Disease**: Common psoriasis is the most frequent type, with a wide range of skin lesions; a few types, such as erythrodermic psoriasis, may affect most of the skin on the body.
2. **Treatment and Nursing Care:** Standardized treatment and scientific nursing care help control the spread of skin lesions; improper treatment or neglect of management may worsen the condition.
3. **Personal triggering factors:** Infection, mental stress, trauma, or inappropriate medication may sometimes cause the original skin lesions to expand.
To manage your condition more effectively, please note the following: First, always seek proper treatment under the guidance of a dermatologist; never self-medicate or rely on folk remedies. Second, keep a record of and try to avoid personal triggers that may worsen your condition, such as overwork or skin injury. Finally, maintain a healthy lifestyle, including a balanced diet, moderate exercise, and emotional regulation, which will play a positive role in keeping your condition stable.