A cough is your body's way of responding when something irritates your throat or airways. An irritant stimulates nerves that send a message to your brain. The brain then tells muscles in your chest and abdomen to push air out of your lungs to force out the irritant.
An occasional cough is normal and healthy. A cough that persists for several weeks or one that brings up discolored or bloody mucus may indicate a condition that needs medical attention.
At times, coughing can be very forceful. Prolonged, vigorous coughing can irritate the lungs and cause even more coughing. It is also exhausting and can cause sleeplessness, dizziness or fainting, headaches, urinary incontinence, vomiting, and even broken ribs.
While an occasional cough is normal, a cough that persists may be a sign of a medical problem.
A cough is considered "acute" if it lasts less than three weeks. It is considered "chronic" if it lasts longer than eight weeks (four weeks in children).
Some causes of coughs include:
Call your doctor if your cough (or your child's cough) doesn't go away after a few weeks or if it also involves any one of these:
- Coughing up thick, greenish-yellow phlegm
- Wheezing
- Experiencing a fever
- Experiencing shortness of breath
- Experiencing fainting
- Experiencing ankle swelling or weight loss
Seek emergency care if you or your child is:
- Choking or vomiting
- Having difficulty breathing or swallowing
- Coughing up bloody or pink-tinged phlegm
- Experiencing chest pain
Self-care measures
Cough medicines usually are used only when cough is an acute condition, causes a lot of discomfort, interferes with sleep and is not associated with any of the potentially worrisome symptoms indicated above. If you use cough medicine, be sure to follow the dosing instructions.
Over-the-counter cough and cold medicines are intended to treat the symptoms of coughs and colds, not the underlying disease. Research suggests that these medicines haven't been proved to work any better than inactive medicine (placebo). More important, these medications have potentially serious side effects, including fatal overdoses in children younger than 2 years old.
Don't use over-the-counter medicines, except for fever reducers and pain relievers, to treat coughs and colds in children younger than 6 years old. Also, consider avoiding use of these medicines for children younger than 12 years old.
To ease your cough, try these tips:
- Suck cough drops or hard candies. They may ease a dry cough and soothe an irritated throat. Don't give them to a child under age 6, however, because of the risk of choking.
- Consider taking honey. A teaspoon of honey may help loosen a cough. Don't give honey to children younger than 1 year old because honey can contain bacteria harmful to infants.
- Moisturize the air. Use a cool mist humidifier or take a steamy shower.
- Drink fluids. Liquid helps thin the mucus in your throat. Warm liquids, such as broth tea or lemon juice, can soothe your throat.
- Avoid tobacco smoke. Smoking or breathing secondhand smoke can make your cough worse.
Show References
- Cough. National Heart, Lung, and Blood Institute. https://www.nhlbi.nih.gov/health-topics/cough. Accessed May 8, 2019.
- Kasi AS, et al. Cough. Pediatrics in Review. 2019;40:157.
- Cough in adults. Merck Manual Professional Version. https://www.merckmanuals.com/professional/pulmonary-disorders/symptoms-of-pulmonary-disorders/cough-in-adults?query=cough. Accessed May 8, 2019.
- Cough in children. Merck Manual Professional Version. https://www.merckmanuals.com/professional/pediatrics/symptoms-in-infants-and-children/cough-in-children?query=cough. Accessed May 8, 2019.
- When to give kids medicine for coughs and colds. U.S. Food and Drug Administration. https://www.fda.gov/consumers/consumer-updates/when-give-kids-medicine-coughs-and-colds. Accessed May 8, 2019.
- Kellerman RD, et al. Cough. In: Conn's Current Therapy 2019. Philadelphia, Pa.: Elsevier; 2019. https://www.clinicalkey.com. Accessed May 8, 2019.
- Broaddus VC, et al., eds. Cough. In: Murray and Nadel's Textbook of Respiratory Medicine. 6th ed. Philadelphia, Pa.: Saunders Elsevier; 2016. https://www.clinicalkey.com. Accessed May 8, 2019.
- AskMayoExpert. Chronic cough. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2017.
- Use caution when giving cough and cold products to kids. U.S. Food and Drug Administration. https://www.fda.gov/drugs/special-features/use-caution-when-giving-cough-and-cold-products-kids. Accessed May 8, 2019.
- Thompson DA. Cough. In: Adult Telephone Protocols: Office Version. 4th ed. Itasca, Ill.: American Academy of Pediatrics; 2018.
- Schmitt BD. Cough. In: Pediatric Telephone Protocols: Office Version. 16th ed. Itasca, Ill.: American Academy of Pediatrics; 2018.
- Pappas DE. The common cold in children: Management and prevention. https://www.uptodate.com/contents/search. Accessed May 20, 2019.
- Green JL, et al. Safety profile of cough and cold medication use in pediatrics. Pediatrics. 2017;139:1.
- Botulism: Prevention. Centers for Disease Control and Prevention. https://www.cdc.gov/botulism/prevention.html. Accessed June 4, 2019.
- Olson EJ (expert opinion). Mayo Clinic, Rochester, Minn. June 5, 2019.
- Laryngitis. Merck Manual Professional Version. https://www.merckmanuals.com/professional/ear,-nose,-and-throat-disorders/laryngeal-disorders/laryngitis. Accessed June 10, 2019.
- Coronavirus disease 2019 (COVID-2019). Centers for Disease Control and Prevention. https://www.cdc.gov/coronavirus/2019-ncov/index.html. Accessed June 11, 2020.
Original article: https://www.mayoclinic.org/symptoms/cough/basics/definition/SYM-20050846