This is due to sweating. This is absolutely normal. The odor under your arms is caused by bacteria that are attracted to the places where you sweat the most.
Advice
1. Shave your underarm every 3 days
2. If you are too much hairy then trim those hairs by trimmer
3. Avoid strenuous activity
4. Drink 4 – 5 liters of water daily
5. Keep your underarm area clean and dry
6. Apply
ketoconazole dusting powder in wet areas of your body such underarm, groin and gluteal cleft
7. Take high protein diet such as eggs and cheese to boost immunity
8. Do not take much mental
stress as any kind of mental stress also causes excessive sweating
9. Bath two times daily with good quality soap
10. For body smell, use over the counter deodorant after taking bath two times daily
11. Wear clothes made of cotton, wool, or silk
12. Avoid
smoking, coffee and caffeinated beverages
13. Avoid garlic, onion, and red meat
Thanks