Ear Problems. Ear problems are often caused by an infection. However, other conditions may also cause ear pain or discomfort. Follow this chart for more information about ear problems. Our trusted Symptom Checker is written and reviewed by physicians and patient education professionals. Find a possible diagnosis by choosing a symptom and answering a few simple questions.
Body hair really gets going during puberty. Some boys will start to notice hair growing on their face around the chin, on the cheeks, and above the lip. Also, hair grows on the chest, the armpits, and even down there in the pubic region.
A girl's puberty can span from the age of 9 to 14 years, while a boy's lasts from the ages of 10 to 17 years. The main male sex hormones are testosterone and androgen. Testosterone produces the changes related to virilization, or becoming male, including a deeper voice, facial hair, and muscle development.