Antibiotics are medicines that fight bacterial infections in people and animals. They work by killing the bacteria or by making it hard for the bacteria to grow and multiply.

Antibiotics can be taken in different ways:

• Orally (by mouth). This could be pills, capsules, or liquids.
• Topically. This might be a cream, spray, or ointment that you put on your skin. It could also be eye ointment, eye drops, or ear drops.
• Through an injection or intravenously (IV). This is usually for more serious infections.

Antibiotics only treat certain bacterial infections, such as strep throat, urinary tract infections, and E. coli.

You may not need to take antibiotics for some bacterial infections. For example, you might not need them for many sinus infections or some ear infections. Taking antibiotics when they're not needed won't help you, and they can have side effects. Your health care provider can decide the best treatment for you when you're sick. Don't ask your provider to prescribe an antibiotic for you.

Antibiotics do not work on viral infections. For example, you shouldn't take antibiotics for:

• Colds and runny noses, even if the mucus is thick, yellow, or green
• Most sore throats (except strep throat)
• Flu
• Most cases of bronchitis

The side effects of antibiotics range from minor to very severe. Some of the common side effects include:

• Rash
• Nausea
• Diarrhea
• Yeast infections

More serious side effects can include:

• C. diff infections, which cause diarrhea that can lead to severe colon damage and sometimes even death
• Severe and life-threatening allergic reactions
• Antibiotic resistance infections

Call your health care provider if you develop any side effects while taking your antibiotic.

You should only take antibiotics when they are needed because they can cause side effects and can contribute to Antibiotic resistance infections. Antibiotic resistance happens when the bacteria change and become able to resist the effects of an antibiotic. This means that the bacteria continue to grow.

When you take antibiotics, it is important that you take them responsibly:

• Always follow the directions carefully. Finish your medicine even if you feel better. If you stop taking them too soon, some bacteria may survive and re-infect you.
• Don't save your antibiotics for later.
• Don't share your antibiotic with others.
• Don't take antibiotics prescribed for someone else. This may delay the best treatment for you, make you even sicker, or cause side effects.

Centers for Disease Control and Prevention

Asthma is a chronic (long-term) lung disease. It affects your airways, the tubes that carry air in and out of your lungs. When you have asthma, your airways can become inflamed and narrowed. This can cause wheezing, coughing, and tightness in your chest. When these symptoms get worse than usual, it is called an asthma attack or flare-up.

Asthma often starts during childhood, usually before age 5. Many children have asthma - it is the most common chronic disease of childhood. It can cause children to miss school and end up in the hospital. But treatments can help manage asthma.

The exact cause of asthma is unknown. Genetics and environment likely play a role in which children get asthma.

An asthma attack can happen when your child is exposed to an asthma trigger. An asthma trigger is something that can set off or worsen asthma symptoms. Different triggers can cause different types of asthma:

• Allergic asthma is caused by allergens. Allergens are substances that cause an allergic reaction. They can include
  • Dust mites
  • Mold
  • Pets
  • Pollen from grass, trees, and weeds
  • Waste from pests such as cockroaches and mice
• Nonallergic asthma is caused by triggers that are not allergens, such as
  • Breathing in cold air
  • Certain medicines
  • Household chemicals
  • Infections such as colds and the flu
  • Outdoor air pollution
  • Tobacco smoke
• Exercise-induced asthma happens during physical exercise, especially when the air is dry

Asthma triggers may be different for each child and can change over time.

Certain factors raise the risk of asthma in children:

• Being exposed to secondhand smoke when their mother is pregnant with them or when they are small children
• Genetics and family history. Children are more likely to have asthma if one of their parents has it, especially if it's the mother.
• Race or ethnicity. Black and African Americans and Puerto Ricans are at higher risk of asthma than people of other races or ethnicities.
• Having other diseases or conditions such as obesity and allergies
• Often having viral respiratory infections as young children
• Sex. In children, asthma is more common in boys. In teens, it is more common in girls.

The symptoms of asthma in children include:

• Chest tightness
• Coughing, especially at night or early morning
• Breathing problems, such as shortness of breath, rapid breathing, or gasping for air
• Feeling tired
• Dark circles under the eyes
• Being irritable
• Wheezing, which causes a whistling sound when they breathe out
• Trouble eating or sucking (in infants)

These symptoms can range from mild to severe. They may happen often or only once in a while.

When children have an asthma attack, their symptoms get much worse. The attacks may come on gradually or suddenly. Sometimes they can be life-threatening. Warning signs of a severe attack include severe coughing, serious breathing problems, and turning very pale or blue in the face, lips and/or fingernails. If your child has those symptoms, get medical help right away.

It can be hard to diagnose asthma in children, especially if they are young. Asthma has similar symptoms as other childhood conditions. And some children may not have asthma symptoms very often, so it may seem like they are having respiratory infections instead.

Your child's health care provider may use many tools to diagnose asthma:

• Physical exam
• Medical history
• Chest x-ray
• Lung function tests, including spirometry, to test how well the lungs work. Younger children are usually not able to do these tests.
• Allergy skin or blood tests, if you have a history of allergies. These tests check which allergens cause a reaction from your immune system.

If you have a young child who cannot do lung function tests, the provider may suggest doing a trial of asthma medicines. The trial involves giving your child the medicines for several weeks to see whether the symptoms get better.

If your child has asthma, you will work with their health care provider to create a treatment plan. The plan will include ways to manage your child's asthma symptoms and prevent asthma attacks, such as:

• Strategies to avoid triggers. For example, if tobacco smoke is a trigger for your child, you should not allow anyone to smoke in your home or car.
• Short-term relief medicines, also called quick-relief medicines. They help prevent symptoms or relieve symptoms during an asthma attack. They include an inhaler to have for your child at all times. It may also include other types of medicines which work quickly to help open your child's airways.
• Control medicines. They work by reducing airway inflammation and preventing narrowing of the airways. Not all children will take control medicines. Whether or not your child needs them depends on how severe the asthma is and how often your child has symptoms.

If your child has a severe attack and the short-term relief medicines do not work, get medical help right away.

Your child's provider may adjust the treatment until the asthma symptoms are controlled.

Bell's palsy is the most common cause of facial paralysis. It usually affects just one side of the face. Symptoms appear suddenly and are at their worst about 48 hours after they start. They can range from mild to severe and include:

• Twitching
• Weakness
• Paralysis
• Drooping eyelid or corner of mouth
• Drooling
• Dry eye or mouth
• Excessive tearing in the eye
• Impaired ability to taste

Scientists think that a viral infection makes the facial nerve swell or become inflamed. You are most likely to get Bell's palsy if you are pregnant, diabetic or sick with a cold or flu.

Three out of four patients improve without treatment. With or without treatment, most people begin to get better within 2 weeks and recover completely within 3 to 6 months.

NIH: National Institute of Neurological Disorders and Stroke

Botox is a drug made from a toxin produced by the bacterium Clostridium botulinum. It's the same toxin that causes a life-threatening type of food poisoning called botulism. Doctors use it in small doses to treat health problems, including:

• Temporary smoothing of facial wrinkles and improving your appearance
• Severe underarm sweating
• Cervical dystonia - a neurological disorder that causes severe neck and shoulder muscle contractions
• Blepharospasm - uncontrollable blinking
• Strabismus - misaligned eyes
• Chronic migraine
• Overactive bladder

Botox injections work by weakening or paralyzing certain muscles or by blocking certain nerves. The effects last about three to twelve months, depending on what you are treating. The most common side effects are pain, swelling, or bruising at the injection site. You could also have flu-like symptoms, headache, and upset stomach. Injections in the face may also cause temporary drooping eyelids. You should not use Botox if you are pregnant or breastfeeding.

Cancer is not just one disease but many diseases. Cancer begins in your cells, which are the building blocks of your body. Usually, your body forms new cells as needed, replacing old cells that die. Sometimes this process goes wrong. New cells grow even when you don't need them, and old cells don't die when they should. These extra cells can form a mass called a tumor.

Tumors can be benign or malignant. Benign tumors aren't cancer, while malignant ones are. Cells from malignant tumors can invade nearby tissues. They can also break away and spread to other parts of your body. The spread of cancer from one part of the body to another is called metastasis. Symptoms and treatment depend on the type of cancer and how advanced it is.

There are more than 100 different types of cancer. Cancer can start almost anywhere in your body. Most cancers are named for where they start. For example, lung cancer starts in the lung, and breast cancer starts in the breast.

Cancer may also be described by the type of cell that formed it, such as sarcoma if cancer begins in your bone and soft tissue. Carcinoma is the most common type of cancer. It is formed by epithelial cells, the cells that cover the inside and outside surfaces of your body.

Cancer is a genetic disease. That means changes in your genes cause it. Changes in your genes are also called gene variants or mutations. Genes are parts of DNA in your cells that you inherit from your parents. However, only some cancers are caused by genes passed down from your parents.

Genetic changes can occur to your genes over your lifetime that affect how your cells function. Usually, your body gets rid of damaged cells before they turn cancerous, but this ability goes down as you age. Other factors that may affect your risk of developing cancer can include:

• Exposure to ultraviolet (UV) rays from the sun
• Smoking
• Your diet
• Physical inactivity

Cancer symptoms depend on the type of cancer. For example, some of the symptoms that cancer may cause can include:

• A lump in your breast
• Blood in your urine (pee) or stool (poop)
• Bleeding or bruising for no known reason
• A sore that doesn't heal
• Trouble swallowing
• A new mole or a change to a mole you already have

Cancer may cause various symptoms but often doesn't cause pain. Don't wait until you're having pain before seeing your health care provider. See your provider if you have symptoms that don't get better in a few weeks.

There is no single test that can diagnose cancer. The tests ordered are usually based on your symptoms. Your provider may:

• Ask about your medical history
• Ask about your family health history, including relatives who have had cancer
• Do a physical exam
• Do a screening test such as a mammogram, colonoscopy, or a Pap test
• Order blood tests or imaging tests

To find out if you have cancer, your provider may order a biopsy. A biopsy is the procedure of removing and examining tissue, cells, or fluids from your body.

Treatment depends on the type of cancer and how advanced it is. Most treatment plans may include surgery, radiation, and/or chemotherapy. Some may involve hormone therapy, immunotherapy or other types of biological therapy, or stem cell transplantation.

It's usually not possible to know exactly why cancer develops in some people but not others. There are some things that you can't control which may increase or decrease your risk of getting cancer, such as inheriting certain genes or your age. But some lifestyle habits may increase your risk of certain types of cancer. Avoid or reduce lifestyle habits such as:

• Smoking and tobacco use
• Having too much sun exposure
• Drinking too much alcohol
• Not getting enough physical activity
• Having obesity

NIH: National Cancer Institute