Most boys get their growth spurt between the age of 11 and 14 years.
During this time the body becomes bigger and taller
One of the first parts that begins to grow firsts is feet because the bones in the feet grow faster than other bones in the body. Hence, the feet become of full size before rest of our body.
Some bones in the body grow bigger than others giving shape to our body
Shoulders grow a lot and hips grow comparatively little. Legs and arms grow more than backbone.
This finally gives a shape of an adult body
The muscles also get bigger especially in legs and arms and become stronger.
The chest also becomes bigger with growing muscles and deposits of fat under the skin
Many boys notice their breasts becoming bigger and painful with nipples growing and areola becoming larger and darker
This change in breasts is normal in boys which occurs due to influence of hormones and usually subsides within a year or two.
During these changes it is advisable for a boy to remain calm and patient. As the speed and time of his final growth is determined by the genes you carry from your parents.
He should be advised not to compare himself with growth of other boys and feel inferior or anxious.
With the growth of Voice box, larynx the vocal cords get stretched to which makes the voice deeper.
Once the voice has changed, the beard starts growing on the face. First it is very gradual with thin and light hair which later becomes thick and coarse as the boy starts shaving.