Myopathy and diabetes mellitus is a rare condition that is characterized by muscle disease and diabetes mellitus. Diabetes mellitus, or simply diabetes, refers to a group of diseases that affect how your body uses blood glucose, or blood sugar. Symptoms of diabetes include frequent urination, feeling very thirsty and hungry (even when you are eating), feeling very tired, blurry vision, cuts and bruises that heal slowly, weight loss (even if you are eating more), and tingling, pain, or numbness in the hands and/or feet. Onset can take place at any time in an individual’s life, and can occur during pregnancy (gestational diabetes) even if the woman has never been diagnosed with diabetes before. If you are diagnosed with diabetes, there are different methods available to help monitor blood-glucose (sugar) levels depending upon which type of diabetes you are diagnosed with. Myopathy means muscle disease, meaning that the affected person’s muscles do not work like they are supposed to. Symptoms of myopathy include muscle weakness, cramps, stiffness, and spasms. Talk with your doctor if you have been diagnosed with myopathy and diabetes mellitus to find the best treatment option for you.