The following are the secondary sex characteristics of boys:
a. Hair:
Immediately after the development of primary sex characteristics, pubic hair appears followed by axillary and facial hair.
b. Skin:
The skin becomes coarse and the pores in the skin enlarge.
c. Glands:
The oil producing glands in the skin enlarge and due to this acne may appear on the faces.
d. Muscle The strength of the muscle increases and it gives shape to arms, legs and shoulders.
e. Voice During this period voice changes occur and the voice becomes husky. Then its pitch drops and the volume increases.