(CNN) - Carmichael Griffin didn't think anything of it when his face began to swell. He assumed he had just gained a couple of pounds.
But when the swelling progressed to severe vomiting and frequent urination, he knew something was wrong.
It turned out that both of his kidneys were failing. He was suffering from hypertension, a common ailment among African-American patients.Carmichael Griffin has been on dialysis and awaiting a kidney transplant for nearly 12 years.