 [ Symptoms ] skin has grown over my back molar it has begun to get very sore even raw especially while eating what should i do [ Disease ] you do not have to sign up for medicare part b but you will be missing important medical coverage if you do not part b helps pay for outpatient services such as doctor visits also if you do not sign up when you are first eligible and decide to do so at a later time you will pay a penalty that will stick with you for life if you can not afford coverage you should contact someone who can help you apply for a program that will cover those costs if you qualify visit the medicare gov medicare helpful contacts page or call 1 800 medicare 1 800 633 4227 for personalized help