Thanks for writing to us.
You seem to be suffering from axillary hyperhidrosis
To treat the same and prevent bad odour, you may follow these suggestions
1) use an antibacterial soap to bathe
2) shave your axillary hair frequently
3) use aluminium chloride hexahydrate lotion available as drysol every night for a week then wash it off in morning. This would block sweat ducts and prevent sweating.
4) if this doesn't work, you might need to take iontophoresis
Hope that helped.