My hair is starting to fall out about 20 hairs at a time. I'm 33 yr old white male no history of baldness in family. What could be the cause?

Hair loss. Hair loss may result from multiple factors such as genetics, nutrition, hormones, vitamin & mineral deficiecncy, autoimmune disorders, enviormental factors, hair breakage, Telogen Effluvium amongst others. You should visit a Dermatologist who specializes in hair loss for further evaluation.