Table of Contents
How can I tell if I have a cold or the flu?
Although the common cold and the flu share many similar symptoms, they are 2 different conditions.
The symptoms of a cold develop slowly and can include:
- Fever up to 102°F
- Runny or stuffy nose (often with green- or yellow-colored discharge)
- Sore throat
- Muscle aches
- Watery eyes
Cold symptoms generally are milder than flu symptoms.
Flu symptoms usually appear suddenly and can include:
- Fever over 102°F
- Stuffy nose
- Chills and sweats
- Muscle aches, especially in your back, arms and legs
- Loss of appetite
What is H1N1 flu?
The H1N1 influenza (also called swine influenza or swine flu) is a respiratory infection caused by a virus found in pigs. H1N1 flu can infect humans. For more information, see H1N1 Influenza.
Should I call my doctor?
In most cases, you don't need to see your doctor when you have a cold or the flu. However, if you have any of the symptoms in the box below, call your doctor.
Call your doctor if you have these cold and flu symptoms:
- High fever (above 103°F), or a fever that lasts for more than 3 days
- Symptoms that last for more than 10 days
- Trouble breathing, fast breathing or wheezing
- Bluish skin color
- Earache or drainage from the ear
- Changes in mental state (such as not waking up, irritability or seizures)
- Flu-like symptoms that improve, but return with a fever and a worse cough
- Worsening of a chronic medical condition (such as diabetes or heart disease)
- Vomiting or abdominal pain
- A high, prolonged fever (above 102°F) with fatigue and body aches
- Symptoms that last for more than 10 days or get worse instead of better
- Trouble breathing or shortness of breath
- Pain or pressure in the chest
- Fainting or feeling like you are about to faint
- Confusion or disorientation
- Severe or persistent vomiting
- Severe sinus pain in your face or forehead
- Very swollen glands in the neck or jaw
Causes & Risk Factors
What causes colds and the flu?
Viruses cause colds and the flu. More than 200 different viruses can cause colds. Not as many viruses cause the flu. That's why there's a shot available for the flu and not for colds.
Can I prevent catching a cold or the flu?
You can reduce your risk of catching a cold or the flu by washing your hands frequently, which stops the spread of germs. Eating healthy, exercising and getting enough sleep also play a part in preventing colds and the flu because they help boost your immune system.
Cough and sneeze into the inside of your elbow (rather than into your hand). Clean common surfaces, such as table and counter tops, your child's toys, door handles, and bathroom facilities with anti-bacterial disinfectant. This can help stop the spread of germs.
The best way to avoid getting the flu is to get the influenza vaccine. You should get the vaccine when it becomes available each fall (in October or November), but you can also get it any time throughout the flu season (into December, January and beyond). The vaccine is available by shot or by nasal spray. However, the Centers for Disease Control & Prevention (CDC) recommend the nasal-spray vaccine should not be used for the 2016-2017 flu season. Data from the CDC and other groups showed poor or relatively lower effectiveness of the nasal spray vaccine during previous flu seasons.
Vaccines work by exposing your immune system to the flu virus. Your body will build up antibodies to the virus to protect you from getting the flu. The flu shot contains dead viruses. The flu shot is safe for adults and all children 6 months of age and older, and it is strongly recommended that all children 6 months of age to 59 months of age get a yearly flu shot. The nasal-spray vaccine contains live but weakened viruses. It is safe for adults and all children 2 years of age and older who do not have asthma or breathing problems. You cannot get the flu from the flu shot or the nasal-spray vaccine. While it is not recommended for the 2016-2017 flu season, there are certain patients who should always talk to their doctor before getting the nasal-spray vaccine. More Info.
Some people who get the vaccine will still get the flu, but they will usually get a milder case than people who aren't vaccinated. The vaccine is especially recommended for people who are more likely to get really sick from flu-related complications.
What can I do to feel better?
There's no cure for the common cold. All you can do to feel better is treat your symptoms while your body fights off the virus.
For the flu, your doctor will probably recommend that you treat the symptoms until you feel better. In severe cases, your doctor may prescribe an antiviral medicine. Antiviral medicines can shorten the length of time you are sick with the flu. These medicines come as pills, syrup or in an inhaler. The inhaled type may cause problems for some people who have asthma or chronic obstructive pulmonary disease (COPD).
What medicines can I give my child?
There is no cure for the cold or the flu, and antibiotics do not work against the viruses that cause colds and the flu.
Pain relievers such as acetaminophen (one brand: Children's Tylenol) can help ease the pain of headaches, muscle aches and sore throats as well as treat fevers. Be sure you are giving your child the correct dose according to his or her age and weight.
Nasal sprays and decongestants are not recommended for young children, as they may cause side effects. Cough and cold medicines are not recommended for children, especially those younger than 2 years of age. There is also little evidence that cough and cold medicines and nasal decongestants are effective in treating children.
To treat a cold or the flu, make sure that your child rests and drinks plenty of fluids. You can use a humidifier to help moisten the air in your child's bedroom. This will help with nasal congestion. You can also use a saline nasal spray to thin nasal mucus, and a bulb syringe to suction mucus out of your baby or child's nose.
What over-the-counter medicines can I take for a cold or the flu?
Over-the-counter medicines cannot cure a cold or the flu. Medicine can, however, help relieve some of your cold or flu symptoms. Check with your doctor before giving any medicine to children.
Many cold and flu products are available without a prescription.
Questions to Ask Your Doctor
- How long will I be sick?
- How long should I keep my child home from daycare or school?
- What can I do to make myself more comfortable?
- Are there any medicines you would recommend?
- Should I get the flu vaccine? Should I have my child vaccinated?
- When should I call my doctor?
- How long will I be contagious?
- I'm pregnant. Is there any danger to my baby from the flu?
- Will steam help my congestion?
- Are cough medicines safe for my child?
- Appropriate Use of Antibiotics for URIs in Children: Part II. Cough, Pharyngitis and the Common Cold by SF Dowell, M.D., M.P.H., B Schwartz, M.D., WR Phillips, M.D., M.P.H., and The Pediatric URI Consensus Team (American Family Physician October 15, 1998)
- Evaluation of Pregnant Women Exposed to Respiratory Viruses by John W. Ely, M.D., M.S.P.H., Jerome Yankowitz, M.D., and Noelle C. Bowdler, M.D. (American Family Physician May 15, 2000)
Copyright © American Academy of Family Physicians
This information provides a general overview and may not apply to everyone. Talk to your family doctor to find out if this information applies to you and to get more information on this subject.