Q. Can being anxious or nervous contribute to a rosacea flare-up? I do a lot of public speaking and find my face sometimes gets red and swollen before an engagement.

A. Since anxiety and nervousness are forms of emotional stress, it's quite likely that the anticipation of your speaking engagement could result in a rosacea flare-up. In a National Rosacea Society survey of 602 patients, 88 percent said their rosacea often or sometimes flares up when they are under emotional stress.

Shoppers beware. Everyday items you put in your grocery cart could end up registering a rosacea flare-up. That's why reading food and skin-care product labeling before getting to the check-out line, and planning a grocery list in advance, may help sufferers learn to better manage their condition.

Q. Is rosacea contagious?

A. No. Rosacea is not considered an infectious disease, and there is no evidence that it can be spread by contact with the skin or through inhaling airborne bacteria. The effectiveness of antibiotics against rosacea symptoms is believed to be due to their anti-inflammatory effect, rather than their ability to destroy bacteria.

While emotional stress is one of the most common tripwires for rosacea flare-ups, using stress reduction techniques may help reduce flare-ups for the great majority of rosacea sufferers, according to a recent survey of Rosacea Review readers.

In a survey of 602 rosacea patients, 88 percent said that their rosacea flares up when they are under emotional stress. Only 8 percent reported that stress was not a factor.

Q. Can indoor temperature affect my rosacea?

A. It is possible that indoor temperature could affect rosacea in certain cases, since anything that causes a sufferer to flush may have the potential to lead to a flare-up. Hot weather has been documented on surveys as a rosacea trigger for 53 percent of sufferers, and being "too warm" indoors can also induce flushing.

Why do some foods prompt rosacea? Anything consumed that brings on flushing -- most commonly spicy foods or thermally hot beverages -- can be a culprit in inducing a flare-up. And a vast array of other foods, while less common as tripwires, has also been found to affect various individuals.

"Looking good" isn't just a concern of the young. Mature adults also want to make a good impression, and even those firmly established in long-term social relationships want to be at their best for social occasions.

Here are tips on how to avoid or cope with a flare-up that could imperil your social life.

• Be prepared. In the days before special occasions, take particular care to avoid lifestyle factors that affect your individual condition. Also be sure to use all medication as prescribed in the weeks before.

A survey recently conducted by the National Rosacea Society helps identify types of skin-care products that commonly pose problems for rosacea sufferers and which ingredients may be important to avoid.

Unlike the lyrics in the Gershwin song, when it's "summertime" the living can be anything but easy for rosacea sufferers. Fortunately, while it's the season when rosacea tends to heat up just like the outdoors, most of these problems can be overcome with proper precautions.

In a National Rosacea Society survey of more than 700 rosacea patients, 71 percent said their condition was affected by changing seasons and 57 percent named summer as the time when their rosacea is at its worst.

Q. I have heard that foods high in histamine may aggravate rosacea. What kinds of foods should I be watching out for?