Q. I’m having a devil of time controlling my bladder. Any suggestions?

Q. My daughter heard that grapefruit juice can be toxic for some people. Is that true?

Q. How important is exercise when you are a senior? Is it worth the risks of hurting yourself?

Q. I have found that I don’t sleep as well as I used to when I was younger. How common is this?

Q. I have found that I don’t sleep as well as I used to when I was younger. How common is this?

Q. I’m 79, and I’ve taken a couple of spills in the last few months. I’m concerned that I might not be as steady on my feet as I used to be. What should I do about this?

Q. Since I started being a babysitting grandparent, I seem to be getting more colds. I must be catching germs from the kids, right?

Q. Since I started being a babysitting grandparent, I seem to be getting more colds. I must be catching germs from the kids, right?

Q. I heard a comedian make a humorous reference to “shingles.” I had shingles, and I didn’t find any humor in the experience. Am I missing something?

Q. I’ve been noticing this thing in my eye. At first I thought it was an eyelash. Then I realized the thing was actually in my eye. One of my friends told me it’s a “floater,” and not to worry. What exactly is a “floater,” and should I see a doctor?