According to reports from People, the songstress was diagnosed with a condition called Graves' Disease back in 2008, which had manifested with itself a host of symptoms like dizzy spells, lumps in her throat, mood swings, hair loss, a fast heart rate, and bulging eyes.
As per Healthline, Graves' Disease is a form of autoimmune disease that directly affects the thyroid function of the body resulting in an inflammation of the thyroid glands. In response to this, the body tends to gain weight, amongst other symptoms.
Thankfully, she recovered from the sickness, but not without undergoing radiation therapy and a bunch of medication. However, she told the outlet in 2011 that she was doing much better and was back to writing and producing for other artists while working on her own album.
She also outed that she had been off her medication under her doctor's supervision. At that point, she was managing her condition through weight loss with a proper diet and regular exercise. Still, she acknowledged that it was not the end of her illness. She added,
You live with it for the rest of your life.
