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.
For guys, these hormones travel through the blood and give the testes the signal to begin the production of testosterone and sperm. Testosterone is the hormone that causes most of the changes in a guy's body during puberty. Sperm cells must be produced for men to reproduce. In girls, FSH and LH target the ovaries, which contain eggs that have been there since birth.