I have a high WBC count because of dental issues. How do I lower it?

Oral-Systemic link. The connection between dental problem and health problems is well known and studied. See your dentist who will perform thorough examinations and take radiographs (x-rays) & will formulate a treatment plan to specifically help you.
Treat dental issues. Dental and gum infection can result in high WBC count. Treat the infection, and the count will go down. Get treatment from a dentist.