Call your healthcare professional if your cough — or your child's cough — doesn't go away after a few weeks or if it also involves:

• Coughing up thick, greenish-yellow phlegm.
• Wheezing.
• A fever.
• Shortness of breath.
• Fainting.
• Ankle swelling or weight loss.

Seek emergency care if you or your child is:

• Choking or vomiting.
• Having trouble breathing or swallowing.
• Coughing up bloody or pink-tinged phlegm.
• Having chest pain.

Self-care measures

Cough medicines usually are used only when a cough is a new condition, causes a lot of discomfort, disrupts your sleep and is not linked with any of the worrisome symptoms listed above. If you use cough medicine, be sure to follow the dosing instructions.

Cough and cold medicines that you buy off the shelf aim to treat the symptoms of coughs and colds, not the underlying disease. Research suggests that these medicines don't work any better than taking no medicine at all. More importantly, these medicines are not recommended for children because of risks of serious side effects, including fatal overdoses in children under 2 years old.

Don't use medicines that you can buy without a prescription, except for fever reducers and pain relievers, to treat coughs and colds in children younger than 6 years old. Also, don't use these medicines for children under 12 years old. Ask your healthcare professional for guidance.

To ease your cough, try these tips:

• Suck on cough drops or hard candies. They may ease a dry cough and soothe an irritated throat. But don't give them to a child under age 6 because of the risk of choking.
• Think about 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 babies.
• Keep the air moist. 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.
• Stay away from tobacco smoke. Smoking or breathing secondhand smoke can make your cough worse.