If you're still worried, please see a paediatrician who would do a complete examination to allay your anxiety.

Anyone including adults would have smelling armpit if they have been busy and sweating all day. Once personal hygiene is on top gear, there is no need to worry. We described an organ called the adrenal glands that sits on our kidneys and who roles includes producing life saving hormones. One of the hormones it produces is responsible for body odour. A process we call adrenarche.

Sweat is a major cause of body odour especially in the armpit.