How can i treat strong smelling armpits? i use deodorant/antiperspirant every day yet my armpits smell through after 2-3 hours. usually the onion smell is what comes through. i dont feel myself sweating a lot through the day either?

Sweat itself is odorless. Some people with a certain makeup of bacteria which inhabit the armpits, have a reaction of the bacteria interacting with sweat to produce certain chemicals that give off that onion smell. Genetics are probably involved. Make sure you fully dry your armpits after a shower or bath and then apply the antiperspirant. Some use apple cider vinegar, green tea or lemon juice.