Hair loss on the top of the head is commonly known as androgenic baldness, which mostly starts in the 20s and 30s. Acne is one of the manifestations of acne. Acne starts at puberty and can last until the age of 25 or even beyond, and is found on the head and face.
Androgenetic alopecia and acne are two different conditions that occur in young people and are not causally related to each other.