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 — the velocity of air from a vigorous cough can approach 500 miles an hour. Prolonged, vigorous coughing is exhausting and can cause sleeplessness, headaches, urinary incontinence 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 doesn't go away after several weeks or if you or your child is:
- Coughing up thick, greenish-yellow phlegm
- Experiencing a fever more than 100 F (38 C)
- Experiencing shortness of breath
Seek emergency care if you or your child is:
- Having difficulty breathing or swallowing
- Coughing up bloody or pink-tinged phlegm
Cough medicines usually are used only when the cause of the cough is unknown and the cough causes a lot of discomfort. If you use cough medicine, be sure to follow the dosing instructions.
Don't give children under age 4 over-the-counter cough medicine without first checking with your child's doctor.
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.
- Take honey. A teaspoon of honey can help loosen a cough. Don't give to children younger than 1 year old.
- Moisturize the air. Use a vaporizer 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.
April 26, 2016
- Cough. National Heart, Lung, and Blood Institute. http://www.nhlbi.nih.gov/health/health-topics/topics/cough/. Accessed March 2, 2016.
- Bope ET, et al. The respiratory system. In: Conn's Current Therapy 2016. Philadelphia, Pa.: Saunders Elsevier; 2016. http://www.clinicalkey.com. Accessed March 2, 2016.
- Silvestri RC, et al. Evaluation of subacute and chronic cough in adults. http://www.uptodate.com/home. Accessed March 2, 2016.
- Benich JJ, et al. Evaluation of the patient with chronic cough. American Family Physician. 2011;84:887.
- Schmitt BD. Pediatric Telephone Protocols. 15th ed. Elk Grove Village, Ill.: American Academy of Pediatrics; 2016.
- AskMayoExpert. Chronic cough. Rochester, Minn.: Mayo Foundation for Medical Education and Research; 2015.
- An important FDA reminder for parents: Do not give infants cough and cold products designed for older children. U.S. Food and Drug Administration. http://www.fda.gov/Drugs/ResourcesForYou/SpecialFeatures/ucm263948.htm. Accessed March 8, 2016.
- Walker RW, et al. Self-reported dysphagia and its correlates within a prevalent population of people with Parkinson's disease. Dysphagia. 2011;26:92.