My mom has arthritis. Should I be worried about getting it too?

Yes. Somewhat. Most people mean osteoarthritis when they refer to "arthritis." this is the most common form of arthrtiis. It is the "wear and tear" type of arthritis and can happen to anyone regardless of family history. However a family history does increase your risk. Exercise regularly, maintain a healthy weight, and avoid joint trauma to reduce your risk of getting osteoarthritis.