I Am 52 Years Old. I Weigh 240 Pounds And

I am 52 years old. i weigh 240 pounds and 5 '4. I am always tired and i sweat a lot. my feet are hot and dry. My hands ate dry and hot and at times tingle. I take atenolol - 25 mg once per day for the past 10 years. i am always tired and thirsty what is my problem?