Alopecia areata, ringworm, and chemotherapy are among the most common causes of a bald spot or patch in the beard. Treatment can vary depending on the underlying cause of a bald patch in the beard.

But don’t dismiss any facial hair loss or changes as simply age-related, she emphasized. “If the facial hair loss is sudden, rapid, symptomatic, or resulting in completely smooth patches ...

There's no suggested dose to use for beard growth. A dose of 50 mg per day of elemental zinc has been shown to increase hair growth in women with hair loss (alopecia). However, whether this dose ...