My brother's face is very sensitive when he shaves so much that it hurts to shave. What can he do?

He is 18 and his face is sensitive. He has acne and even using face wash with microbeads irritate his face. Shaving is a problem for him. When he shaves his face hurts and burns but not extreme or anything for that day. He also gets fine pimples the next day. What can he do? Is there any product I can buy for him when i go shopping to help? He uses Gillette Mach 3 shaver.