After giving birth, hormonal changes cause the body to increase skin pigmentation, causing dark spots and unpleasant odors.
Plucking and shaving underarm hair causes damage to the skin, which is stimulated to increase melanin pigment, causing ingrown hairs, rough skin.
The sweat produced every day clogs the pores in the skin under the arms. In the long run, they will cause this area of the skin to darken and darken