The inner thigh is the groin, where apocrine glands are concentrated. Sweat odor is caused by smelly bacteria bred by sweat glands under the groin. Cleaning the groin every day, combined with spraying Mrs. Cao Dan's deodorant as a way to dredge and clean sweat glands, this smell will disappear. If you mind, you can buy it on a treasure, or you can search Mrs. Cao Dan's popular science first. If you still don't understand, you can also speed up your understanding.