The actress, 24, posted a selfie and explained that she has been suffering from endometriosis since she was 15.
Endometriosis affects an estimated one in ten women and is a disorder that can cause pain — sometimes severe — especially during a woman's period, according to the Mayo Clinic.
"Endometriosis occurs when the normal uterine lining grows outside the uterus and causes pain," Dr. Mamta Mamik, an OBGYN from Mount Sinai Hospital in New York, told ABC News.
Endometriosis occurs in women of child bearing age and can be hard to diagnose. Ridley said she was also diagnosed with Polycystic ovary syndrome after 8 years of tests.
"One laparoscopy, many consultations and 8 years down the line, pain was back (more mild this time!) and my skin was THE WORST. I've tried everything: products, antibiotics, more products, more antibiotics) and all that did was left my body in a bit of a mess. Finally found out I have polycycstic ovaries and that's why it's bad," she wrote in the post.
One symptom the "Star Wars" actress experienced was bad skin, which left her feeling self conscious especially being in the public eye. "Feeling so self conscious has left my confidence in tatters. I hate wearing makeup but I currently don't want to leave the house without it on," she wrote in the Instagram caption.
Dr. Mamik explained that "patients who have polycystic ovarian syndrome have high levels of male hormones that can cause acne."
Ridley has found that with the help of dermatologists and diet changes, like cutting out dairy and most sugar, she is finally making progress and finding relief.
“My point is, to any of you who are suffering with anything, go to a doctor; pay for a specialist; get your hormones tested, get allergy testing; keep on top of how your body is feeling and don't worry about sounding like a hypochondriac,” she wrote. “From your head to the tips of your toes we only have one body, let us all make sure ours our working in tip top condition, and take help if it's needed.”
Ridley's empowering post has received over 200,000 likes and countless comments of outpouring support.