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Common cold

Definition

The common cold most often causes a runny nose, nasal congestion, and sneezing. You may also have a sore throat, cough, headache, or other symptoms.

Patient Education Video: Common cold

Alternative Names

Upper respiratory infection - viral; Cold

Causes

It is called the common cold for good reason. There are over one billion colds in the United States each year. You and your children will probably have more colds than any other type of illness.

Colds are the most common reason that children miss school and parents miss work. Parents often get colds from their children.

Children can get many colds every year. They usually get them from other children. A cold can spread quickly through schools or daycares.

Colds can occur at any time of the year, but they are most common in the winter or rainy seasons.

A cold virus spreads through tiny, air droplets that are released when the sick person sneezes, coughs, or blows their nose.

You can catch a cold if:

  • A person with a cold sneezes, coughs, or blows their nose near you
  • You touch your nose, eyes, or mouth after you have touched something contaminated by the virus, such as a toy or doorknob

People are most contagious for the first 2 to 3 days of a cold. A cold is most often not contagious after the first week.

Is It a Cold or Allergy?

Sneezing, coughing, and a runny nose are symptoms of:

Answer:

The correct answer is either one. Colds have similar symptoms to allergic rhinitis, a type of allergy that affects the nose. Common triggers of allergic rhinitis include dust and pollen. To figure out whether your stuffy nose comes from a cold or allergies, think about when your symptoms began.
If you're allergic to something, a reaction usually begins within:

Answer:

The correct answer is a few seconds or minutes. If you breathe in something you're allergic to, your body releases a chemical called histamine. This quickly triggers allergy symptoms, such as watery eyes or a runny nose. Using an antihistamine can help reduce allergy symptoms.
If you're around someone with a cold, you might get sick within:

Answer:

The correct answer is 2-3 days. You can catch a cold if: • A person with a cold sneezes, coughs, or blows their nose near you. • You touch your nose, eyes, or mouth after touching something coated with a cold virus, such as a doorknob. You can help prevent colds by washing your hands or using a hand sanitizer often.
Having aches, pains, or a fever means you probably have a cold, not allergies.

Answer:

The correct answer is true. Allergies don't cause achiness or fever. Adults and older children with colds most often have a low fever or no fever. Young children with a cold often run a fever around 100-102°F. Acetaminophen (Tylenol) or ibuprofen (Advil, Motrin) can help lower a fever. Never give aspirin to children. People with more severe allergies may feel tired.
If you have a cough or your throat hurts, you must have a cold.

Answer:

The correct answer is false. Either a cold or allergies can cause cough and a sore throat. Try hard candy or lozenges to ease a sore throat and calm a cough. Avoid using lozenges in children under age 3.
A cold usually lasts:

Answer:

The correct answer is 1 week. If you still feel sick after 7 days, see your doctor to rule out a sinus infection, allergies, or other medical problem.
Antibiotics can help treat a cold, but not allergies.

Answer:

The correct answer is false. Antibiotics only kill bacteria, not viruses. Colds are caused by viruses, and allergies are caused by allergens. This means antibiotics will not work against colds or allergies. Over-the-counter (OTC) cold medicines can help ease cold symptoms. Don't use any OTC cold remedies in children under age 6.
Which can trigger an asthma attack?

Answer:

The correct answer is either one. If you have asthma, a cold or allergies can make it worse. Use your rescue inhaler as prescribed if you begin wheezing. Colds are the most common trigger of asthma symptoms in children. If asthma medicine doesn't help, call your doctor.
A thick yellow or green nasal discharge is normal with a cold.

Answer:

The correct answer is true. The fluid from your runny nose will become thicker and may turn yellow or green within a few days. This is normal and does not mean that you need antibiotics. Drinking plenty of fluids can help. If discharge doesn't go away in 10 - 14 days, call your doctor.
The most common reason kids miss school and parents miss work is:

Answer:

The correct answer is colds. There are over one billion colds in the United States each year. You and your children will likely have more colds than any other type of illness. Getting plenty of sleep, eating healthy foods, getting plenty of exercise, and not smoking can all help keep your immune system strong and keep you healthier.

Symptoms

Cold symptoms usually start about 2 or 3 days after you came in contact with the virus, although it could take up to a week. Symptoms mostly affect the nose.

The most common cold symptoms are:

  • Nasal congestion
  • Runny nose
  • Scratchy throat
  • Sneezing

Adults and older children with colds generally have a low fever or no fever. Young children often run a fever around 100°F to 102°F (37.7°C to 38.8°C).

Depending on which virus caused your cold, you may also have:

  • Cough
  • Decreased appetite
  • Headache
  • Muscle aches
  • Postnasal drip
  • Sore throat
Coronavirus
Coronaviruses are a family of viruses. Infection with these viruses can cause mild to moderate respiratory illnesses such as the common cold. Some coronaviruses may cause severe illness and lead to pneumonia or even death.

Treatment

Most colds go away in a few days. Some things you can do to take care of yourself with a cold include:

  • Get plenty of rest and drink fluids.
  • Over-the-counter (OTC) cold and cough medicines may help ease symptoms in adults and older children. They do not make your cold go away faster, but can help you feel better. These OTC medicines are not recommended for children under age 4.
  • Antibiotics should not be used to treat a common cold.
  • Many alternative treatments have been tried for colds, such as vitamin C, zinc supplements, and echinacea. Talk to your health care provider before trying any herbs or supplements.

Patient Education Video: Tips on buying cold and flu medicines

Outlook (Prognosis)

The fluid from your runny nose will become thicker. It may turn yellow or green within a few days. This is normal, and not a reason for antibiotics.

Most cold symptoms go away within a week in most cases. If you still feel sick after 7 days, see your provider. Your provider may check to rule out a sinus infection, allergies, or other medical problem.

Possible Complications

Colds are the most common trigger of wheezing in children with asthma.

A cold may also lead to:

When to Contact a Medical Professional

Try treating your cold at home first. Contact your provider if:

  • You have problems breathing.
  • Your symptoms get worse or do not improve after 7 to 10 days.

Prevention

To lower your chances of getting sick:

  • Always wash your hands. Children and adults should wash hands after nose-wiping, diapering, and using the bathroom, and before eating and preparing food.
  • Disinfect your environment. Clean commonly touched surfaces (such as sink handles, door knobs, and sleeping mats) with an EPA-approved disinfectant.
  • Choose smaller daycare classes for your children.
  • Use instant hand sanitizers to stop the spread of germs.
  • Use paper towels instead of sharing cloth towels.

The immune system helps your body fight off infection. Here are ways to support the immune system:

  • Avoid secondhand smoke. It is responsible for many health problems, including colds.
  • DO NOT use antibiotics if they are not needed.
  • Breastfeed infants if possible. Breast milk is known to protect against respiratory tract infections in children, even years after you stop breastfeeding.
  • Drink plenty of fluids to help your immune system work properly.
  • Eat yogurt that contains "active cultures." These may help prevent colds. Probiotics may help prevent colds in children.
  • Get enough sleep.

Gallery

Sinuses
The sinuses are hollow cavities within the facial bones. Sinuses are not fully developed until after age 12. When people speak of sinus infections, they are most frequently referring to the maxillary and ethmoid sinuses.
Coronavirus
Coronaviruses are a family of viruses. Infection with these viruses can cause mild to moderate respiratory illnesses such as the common cold. Some coronaviruses may cause severe illness and lead to pneumonia or even death.
Stomach
The stomach is the portion of the digestive system most responsible for breaking down food. The lower esophageal sphincter at the top of the stomach regulates food passing from the esophagus into the stomach, and prevents the contents of the stomach from reentering the esophagus. The pyloric sphincter at the bottom of the stomach governs the passage of food out of the stomach into the small intestine.
Throat anatomy
Structures of the throat include the esophagus, trachea, epiglottis and tonsils.

References

Allan GM, Arroll B. Prevention and treatment of the common cold: making sense of the evidence. CMAJ. 2014;186(3):190-199. PMID: 24468694 www.ncbi.nlm.nih.gov/pubmed/24468694/.

Barrett B, Turner RB. The common cold. In: Goldman L, Schafer AI, eds. Goldman-Cecil Medicine. 26th ed. Philadelphia, PA: Elsevier; 2020:chap 337.

Centers for Disease Control and Prevention. Common colds: protect yourself and others. www.cdc.gov/Features/Rhinoviruses/index.html. Updated October 7, 2020. Accessed April 12, 2021.

Lopez SMC, Williams JV. The common cold. In: Kliegman RM, St Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics. 21st ed. Philadelphia, PA: Elsevier;2020:chap 407.

Last reviewed January 16, 2021 by Linda J. Vorvick, MD, Clinical Associate Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team..

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