As an avid contact wearer, I use saline solution to rinse my contacts daily before each use. Recently, a friend told me that many commercial saline solutions contain preservatives, which could affect the overall health of my eye. Is this something I should be concerned about? The saline I use has always felt comfortable so I never thought it could pose a problem.

I read that disposable contact lenses are actually worse for your eyes than the normal one-year ones because they allow less oxygen to go to your eyes, and the only advantage is that there are less cleansing problems. Also, it is claimed that inadequate oxygen to your eyes (possibly caused by prolonged wearing of contact lenses) leads to a condition when extra blood vessels sprout around the iris, which leads to sight problems at old age. Is that true?

I am very concerned because I normally wear (one-year) contact lenses from 8am to 8pm, and maybe to 12am during reading periods. I don't feel very comfortable with glasses because they give distorted visions and fatigue. I thought switching to disposable contact lenses would do my eyes good. My current lenses contain 38 percent water. Is this good enough?

1) I often have a bad taste in my mouth, and bad breath as well, I assume. This doesn't stem from poor hygiene: I brush my teeth at least three times a day, and usually more. I'm wondering if there is anything I can do about this. Could this be a symptom of some sort of nutritional deficiency? I think my diet is pretty bad, although I'm working pretty hard on getting more protein and eating less fat. I've also been nauseous a lot lately, and vomiting some. Could that be related?

2) Like many people, I often have an embarrassing bad breath. Listerine and other mouthwashes won't be of any help for this chronic problem. There are lots of products available to get rid of "volatile sulfur compounds (VSC)" - that supposedly cause this — and I just don't know which one I should try. Also, what's your opinion on tongue-brushing?

1) When I was a child, I used to wet the bed. This finally cleared up when I was about twelve. In the last month or so, it has come back — except it's even more embarrassing now because I'm twenty-eight and share my bed with my husband! It started when I had a bad cold, so I thought perhaps it was just stress incontinence caused by coughing while asleep. I do suffer somewhat from stress incontinence, but I learned to deal with it when awake by clamping my legs together whenever I cough or sneeze. I talked to my doctor about this, and he also thought it was due to coughing while asleep. He treated my cough and assured me that once the cough was gone, the bedwetting would be, too. Well, my cough has cleared up, but I am still wetting the bed almost every night! It's mortifying, and I feel like my husband finds me disgusting (not that I really blame him). He says it doesn't matter to him, but I feel like I ought to be put in a nursing home. Is there anything I can do to stop this?

2) I have an embarrassing problem that has always held me from going to a doctor. I do not know if it's called incontinence. When I'm out of the rest room, I always find a few drops of urine being discharged later in my dress. This usually occurs when I bend down, or when I sneeze, or sometimes even due to a jerk. I have tried to prevent this many a time by remaining in the comfort room for invariably a long time trying to make sure that I'm done fully, but in vain.

Being a Muslim, I always find it very difficult to offer my prayers due to this. I'm suffering from this problem for a long time. Would you please advise if there is any cure for this? Can some pills treat this or an operation is a must?