>>2, and also, please consider:
1. Does these bumps contain any liquid? Swelling and bleeding? Can you determine if they are warts?
2. Does your family have a history of genital diseases?
3. Have you had sexual contact or used related tools recently?
4. Do you exhibit any other symptoms, such as pain during urination or fever (and etc)?
If you say yes to any of the above,then you should seek a medical professional, even when/if the bumps disappear.
Decreases risk of irritating said bumps by proper cleaning and disposal of towels and anything that comes in contact with it.
Could be completely benign, so don't stress, maintain proper living habits and just write down symptoms and frequency (even after they disappear).