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今天还在继续出疹子好像还比昨天厉害了。刚才上网查了一下觉得因该就是这个了。
What are hives（荨麻疹）?
Hives, also known as urticaria or welts, are swollen areas on the skin. They can show up in different shapes and sizes, but are generally well defined, with a pale, central, raised area surrounded by a red border. And they usually itch.
Your baby may have a group of hives that disappears after a few minutes or a few hours, only to have a new crop show up elsewhere. If your baby breaks out in hives, they could last from a few hours to a few days, although it's possible to have hives for months at a time. Hives are common, but not contagious.
What causes hives?
Hives show up when the body releases a chemical called histamine（组胺）. There are so many reasons this might happen that you might have trouble identifying the culprit, but here are the most likely possibilities:
• Insect bites and stings. If your baby's allergic to bees or fire ants, for example, he could develop hives in reaction to being stung or bitten.
• Food. Your baby might get hives in reaction to something he eats, once he's eating solids. Or he might react to something you ate if you're breastfeeding him. The most likely foods to offend are tree nuts, peanuts, eggs, shellfish, chocolate, fish, milk, fresh or frozen berries, tomatoes, and certain food additives and preservatives. (Some of these foods, like cow's milk, are not suitable for babies, but your baby might still react to them in your breast milk.) He may break out in hives because he's allergic to the protein in the food, or simply because his body reacts to a chemical in the food by releasing histamine. Some children even develop hives simply from coming into contact with certain foods — for example, when the juice from a strawberry gets on their skin. (Surprisingly, those same babies might not react to eating strawberries.)
• AllergensBabies who have developed an allergy to cats could also break out in hives when they touch the kitty. Your baby could even get hives from an allergen in the air, like pollen.
• Illness. Your baby might get hives when he has a cold or other viral infection. Less commonly, he could get hives from a bacterial infection.
• Temperature. Sometimes cold temperatures can cause hives. The same goes for a sudden change in temperature — such as when your baby's skin warms up after being cold.
• Drugs. Antibiotics and some other medications might cause your baby to break out in hives.
How should I treat hives?
If you think your baby has broken out in hives because of a pet or pollen allergy, give him a bath to rinse away as much of the allergen as possible. Cool compresses — or cool baths — sometimes provide relief. You might also try dabbing the hives with calamine lotion on a cotton ball.
Avoid dressing your baby in clothing that's snug in the area where he has hives. And if you can identify the cause of the hives, do your best to keep your baby from being exposed to it in the future.
When should I call the doctor?
Call 911 immediately if your baby has respiratory symptoms such as wheezing or shortness of breath, if his face or tongue swells, or if he passes out. Along with hives, these symptoms can signal anaphylactic shock, a potentially fatal allergic reaction. A baby's respiratory system is so tiny that even a small amount of swelling can make it very difficult for him to breathe.
If your baby's uncomfortable, ask your doctor if you can give him an oral antihistamine (such as over-the-counter Benadryl) to reduce the itching and swelling.
Even if your baby isn't troubled by the hives, talk with his doctor if they last more than a week.
[ 本帖最后由 candy2002 于 2010-3-17 15:30 编辑 ] |
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