Old55
If it's something that's come quickly, you may want to get a check up. It could indicate that something out of whack. Another possibility is lactose intolerance. I don't know if that kicks in with maturity, but I have seen and experienced allergies that can kick in almost over night.
have you seen adult mammal drinking milk??? never, so don't be surprise that stupid people have allergy problem when they still drink milk once
pulled off from the titties...