Mayan Lopez is sharing how symptoms of her then-undiagnosed PCOS — like weight gain and body hair — led to “self-hate” and disordered eating.

After getting her period at age 11, the actress, who stars with her father George Lopez on the NBC sitcom Lopez vs. Lopez, shared that she had "excess facial hair" in adolescence.

"And then, as I started going into college, I gained 75 lbs. in three months,” Lopez, now 28, told hosts Dr. Thaïs “Dr. A” Aliabadi and Mary Alice Haney on the Feb. 11 episode of Dear Media's She MD.

Lopez — who is a patient of Dr. A’s — said “there was no explanation” given to her for her symptoms.  “I went to the doctor and they were just like, ‘Oh, you've had regular periods, like, just go on birth control, try to eat better and exercise.’ ”

That was when she sought Dr. A’s help: “I sent my lab records and your office called me back right away, and they're like, 'How old are you?' And I go, '22.' And they're like, 'You're coming in immediately.' ”

“And you were the first person to tell me that I had PCOS," she said. "It just changed my life — my whole life.”