Hot days during the summer easily make one keep sweating, especially body parts such as face, scalp, chest, and back. Sweat that cannot be exported is mixed with sebum, and it is easy to inflame the hair follicles under the excessive friction of the clothes. Although sweat can be annoying, it’s just a normal metabolic phenomenon. Sweat itself doesn’t smell unless it is decomposed by germs, then the odor will occur.