Can I pop the bumps on my baby’s face and neck?

No. You should never "pop" any bumps on your infant's skin. Doing so could introduce bacteria beneath the skin and lead to infection. Most bumps are normal and resolve with time, however if your child's pediatrician has not seen the bumps, they should be examined.
No. Just leave you can cause an infection is you break the skin that is the natural protection barrier against infections.