I have wetness in my underwear it has a smell it it doesn't smell bad. is that normal or if not what could b the cause of that?

Depends: Discharge in a woman can be abnormal, normal, or transitional. It all depends on your history. It may be important for you to see a provider to be sure. They may be able to run tests on the discharge and obtain a complete history. Some common causes of discharge can be yeast, bacterial vaginosis or std's even in the setting of no discomfort or smell.