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Food allergy is an abnormal response to a food triggered by your body's immune system.

In adults, the foods that most often trigger allergic reactions include fish, shellfish, peanuts, and tree nuts, such as walnuts. Problem foods for children can include eggs, milk, peanuts, tree nuts, soy, and wheat.

The allergic reaction may be mild. In rare cases it can cause a severe reaction called anaphylaxis. Symptoms of food allergy include:

• Itching or swelling in your mouth
• Vomiting, diarrhea, or abdominal cramps and pain
• Hives or eczema
• Tightening of the throat and trouble breathing
• Drop in blood pressure

Your health care provider may use a detailed history, elimination diet, and skin and blood tests to diagnose a food allergy.

When you have food allergies, you must be prepared to treat an accidental exposure. Wear a medical alert bracelet or necklace, and carry an auto-injector device containing epinephrine (adrenaline).

You can only prevent the symptoms of food allergy by avoiding the food. After you and your health care provider have identified the foods to which you are sensitive, you must remove them from your diet.

Most insect bites are harmless, though they sometimes cause discomfort. Bee, wasp, and hornet stings and fire ant bites usually hurt. Mosquito and flea bites usually itch. Insects can also spread diseases. In the United States, some mosquitoes spread West Nile virus. Travelers outside the United States may be at risk for malaria and other infections.

To prevent insect bites and their complications:

• Don't bother insects
• Use insect repellant
• Wear protective clothing
• Be careful when you eat outside because food attracts insects
• If you know you have severe allergic reactions to insect bites and stings (such as anaphylaxis), carry an emergency epinephrine kit

Regular exercise is one of the best things you can do for your health. It has many benefits, including improving your overall health and fitness, and reducing your risk for many chronic diseases. There are many different types of exercise; it is important that you pick the right types for you. Most people benefit from a combination of them:

• Endurance, or aerobic, activities increase your breathing and heart rate. They keep your heart, lungs, and circulatory system healthy and improve your overall fitness. Examples include brisk walking, jogging, swimming, and biking.
• Strength, or resistance training, exercises make your muscles stronger. Some examples are lifting weights and using a resistance band.
• Balance exercises can make it easier to walk on uneven surfaces and help prevent falls. To improve your balance, try tai chi or exercises like standing on one leg.
• Flexibility exercises stretch your muscles and can help your body stay limber. Yoga and doing various stretches can make you more flexible.

Fitting regular exercise into your daily schedule may seem difficult at first. But you can start slowly, and break your exercise time into chunks. Even doing ten minutes at a time is fine. You can work your way up to doing the recommended amount of exercise. How much exercise you need depends on your age and health.

Other things that you can do to make the most of your workouts include:

• Choosing activities that work all the different parts of the body, including your core (muscles around your back, abdomen, and pelvis). Good core strength improves balance and stability and helps to prevent lower back injury.
• Choosing activities that you enjoy. It's easier to make exercise a regular part of your life if you have fun doing it.
• Exercising safely, with proper equipment, to prevent injuries. Also, listen to your body and don't overdo it.
• Giving yourself goals. The goals should challenge you, but also be realistic. It's also helpful to reward yourself when you reach your goals. The rewards could be something big, like new workout gear, or something smaller, such as movie tickets.

Your child spends more time at school than anywhere else except home. Schools can have a major effect on children's health. Schools can teach children about health, and promote healthy behaviors. Physical education classes give children a chance to get exercise.

Schools work to:

• Prevent risky behaviors such as alcohol and tobacco use or bullying and cyberbullying
• Encourage healthy habits like exercise and healthy eating
• Deal with specific health problems in students, such as asthma, obesity and infectious diseases

The school building and environment should be a safe and healthy place for your child.