Pollen

Some doctors prescribe sublingual immunotherapy, known as SLIT, a serum taken as drops under the tongue. Patients like it, but it is not FDA-approved, so insurance usually doesn't cover it.

Some experts say allergies from tree pollen are acting up more and more each year.

With warmer weather approaching, many trees and plants are beginning to bloom. That means the production of pollen and other irritants that can trigger…