25 white male that currently has patches on his face of a lighter skin tone. its as if someone took an eraser to my face. what could this be?

Light areas: Changes in skin tone (hypopigmentation, in this case) may be caused by vitiligo -- i recommend a visit to your doctor, who may send you to a dermatologist.

Pityriasis alba: Sounds like the pale areas people can get as a result of dry skin and inflammation. Pigment cells temporarily go away, resulting in pale patches. Things that help--1) gentle, unscented cleanser. 2) good moisturizer, like cetaphil & others. 3) gentle cortisone, like Hydrocortisone cream, or preferably ointment, to resolve any residual inflammation. Color returns gradually. Vitiligo possible also.