Final answer:
Hair growth on uncommon areas such as the forehead or nose may indicate hirsutism, often caused by hormonal imbalance, or could be related to genetics. Acne, which arises from infected sebaceous glands, can also appear like raised skin bumps and is influenced by hormonal changes, particularly during puberty.
Step-by-step explanation:
Hair growth on uncommon areas like the forehead or nose could be a sign of a medical condition called hirsutism, which is often caused by an imbalance of hormones, specifically androgens. This condition can occur in both men and women and may be seen in various degrees of severity. In some cases, it could also be attributed to genetics. However, acne, a skin condition, could potentially be mistaken for hair growth since inflamed hair follicles can sometimes present as raised skin bumps. Acne is primarily associated with infected sebaceous glands and is common during hormonal changes such as puberty. It manifests on skin areas with dense sebaceous glands, such as the face and back, where blockages and bacterial infections can create pimples.
Oil glands connected to hair follicles release sebum, an oily substance that helps to waterproof the hair and skin, but excess sebum can lead to pimples. Understanding the structure of hair follicles, including the anagen (active phase of the hair growth cycle), and the role of the arrector pili muscle activated in response to stimuli like cold or fear, can help pinpoint issues related to hair growth and skin conditions.