MS affects the ability of nerve cells in the brain and spinal cord to communicate with each other effectively. Symptoms of MS include loss of balance, memory, vision. Problems moving arms, legs, walking, speech, swallowing etc. (It is commonly diagnosed in women between ages 20 and 40). Read more about the disease on Google.
The singer, whose real name is Margaret Mary Oluwatoyin Ejiro Joseph, can't see with her left eye and the vision on her right eye is double. She's also suffering from memory loss and tremors. She's currently receiving treatment in the US. See some of her tweets after the cut..and please do say a prayer for her...