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Sometimes indoor winter air brings a whole new set of allergy and asthma triggers including dust, pet dander, and mold.

Doctors from the American College of Allergy, Asthma and Immunology offer advice on how to stay sneeze-free and sniffle-free while indoors this winter.

*  Reduce moisture in your home to keep dust mites in check. Maintain humidity below 55%, and don’t use a humidifier or a vaporizer.

*  Filter out dust and other allergens by installing a high efficiency furnace filter with a MERV rating of 11 or 12, and be sure to change it every 3 months.

*  Banish allergens from the bedroom (where you spend a third of your life). Keep pets and their dander out, and encase mattresses and pillows with dust-mite-proof covers. Use blinds instead of curtains.

*  Allergy sufferers should wear a NIOSH-rated N95 mask while dusting-a chore that should be done regularly. Wash bedding and stuffed animals in hot water every 14 days and use a vacuum with a HEPA filter.

*  Turn on the fan or open the window to reduce mold growth in bathrooms (while bathing) and kitchens (while cooking). Wear latex-free gloves and clean visible mold with a 5% bleach solution and detergent.

*  Box up books and knick-knacks and limit the number of indoor plants. When you are buying new furniture, like chairs or sofas, opt for leather or other nonporous surfaces to make cleaning easier.

If that scratchy throat hurts when you swallow, you can try some simple home remedies, suggests the NIH News in Health.

*  Drink hot tea with lemon or hot soup.

*  Keep your throat moist with lozenges or hard candies (not for children age 5 and younger).

*  Gargle with warm salt water.

*  Cold liquids, ice chips, or popsicles can numb the pain. Throat sprays and over-the-counter pain relievers can help too.

*  Use a humidifier or vaporizer, especially in the bedroom when sleeping, to keep air from getting too dry.

But if your sore throat is severe, if you have a fever or swollen glands, you might have strep throat, a common bacterial infection. Contact your doctor.

Or maybe the real issue is to heat or not to heat? Either way, whether you’re dealing with a one-time injury or chronic aches and pains, a few simple guidelines will help you know whether it’s best to bag some ice or get the trusty heating pad.

Dr. Scott Lynch, director of sports medicine at Penn State Medical Center, said it’s all about blood flow. When you injure yourself, you should follow guidelines known as RICE-rest, ice, compression, and elevation.

“Elevation is probably the most important thing because it limits the amount of blood flow to the area and the amount of swelling,” he said.

Cold temperatures applied to an injury help constrict, or narrow, the blood vessels and keep blood from pooling there. This could cause too much inflammation or swelling that can delay the healing process.

Dr. Cayce Onks, family and sports medicine physician at Penn State Hershey, said icing an injury for the first 48 to 72 hours after it occurs can reduce the amount of secondary tissue damage. Ice also can help decrease pain.

Use ice for 20 minutes, once an hour. That’s so you don’t create other issues such as frostbite or damage to the skin. It also gives the skin a chance to recover from each icing session.

While special freezer packs are easy to obtain, Dr. Onks said plain old ice in a bag (or a bag of frozen vegetables) works best. “You can mold it around the injury and get more coverage,” he said. “You also have to keep in mind that because of the chemicals in freezer packs, they can get much colder than ice and you could cause temperature-related skin problems.”

Heat, on the other hand, is often used to ease muscle aches and pains, or to loosen up tense and sore areas before activity.

“Heat typically brings blood flow to the area, which provides nutrients that the tissues need for healing,” Dr. Onks said. “It can also increase the flexibility of tendons and muscles.”

Athletes who have chronic issues or old injuries typically heat before they are active and ice afterward. Some people prefer moist heat because they feel the extra humidity helps the heat penetrate.

In an athletic training room or physical therapy setting, providers can also produce deeper heat by using ultrasound. A heating pad or a pack you heat up in the microwave will do the trick. Commercial heat patches or products such as Icy Hot may provide temporary or superficial relief, but they don’t typically offer the penetration of ice, moist heat, or ultrasound.