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.
Testosterone is the hormone that causes most of the changes in a boy's body during puberty, and men need sperm to be able to reproduce (be the father of a baby). In girls, these hormones target the two ovaries (say: OH-vuh-reez), which contain eggs that have been in the girl's body since she was born.