|MadSci Network: Medicine|
Nick: Thanks for your question. Many boys your age are having the same question! You are experiencing some of the body changes which occur when you go through puberty. Puberty is the time when your body begins changing from a boy to a man. During this time, your testicles are releasing more and more testosterone. Testosterone is a hormone or chemical which acts on many parts of your body to make it look and act like a man rather than a boy. Testosterone will cause the muscles of your arms and chest to get bigger and stronger. It will cause the layer of fat under your skin to thin in places like your belly and your chest. You may experience a tenderness and puffiness in your nipples. Sometimes the nipples become so sensitive that even the pressure of your shirt may cause discomfort. Testosterone will cause hair to grow in places you have not had hair before, like under your arms, on your face, and around your genitals (penis and scrotal sac). The hair on your head will begin to grow in a different pattern so that eventually, your hairline will move away from your forehead in a male distribution pattern. You will also notice that your voice is changing to become deeper as the Testosterone thickens your vocal folds. All of the things described are normal events and you should not worry about them. I have included a couple of web addresses which will give you more information. http://www.iwannaknow.org/puberty / http://www.plannedparenthood.org/teenissues/teenmainhtm/Boys_and_pu berty.ht ml http://ww w.youthshakers.org/sexualhealth/youngmen/body.htm Thanks for reading Dr. David Mallory Associate Professor Department of Biological Sciences Marshall University Huntington WV
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