The gymnasium is yellow.

The cause of yellow sweat may be: 1, taking some drugs, such as rifampicin, riboflavin, nitrofurantoin, furazolidone, primaquine and so on. 2. Hepatobiliary diseases: acute and chronic hepatitis, acute and chronic cholecystitis, hepatolithiasis, liver cirrhosis, liver cancer and pancreatic cancer. 3. Food: carrots, oranges, oranges and other foods. 4. Young people have exuberant sweat glands.

I suggest you determine the cause of yellow sweat according to the above, pay attention to hygiene, drink plenty of water and change clothes frequently.