be inflamed
糜 centers on a state of being inflamed, as in a sore or wound that is red, swollen, and irritated.
糜 combines 麻 (hemp) with 米 (rice), but the historical development of the meaning 'be inflamed' from these components is uncertain.
Imagine hemp fibers (麻) rubbing against rice grains (米) inside a wound, causing it to become inflamed and sore.
For ビ, picture a bee stinging the inflamed area: bee -> ビ, and the sting makes the inflammation worse.