Most short-term coughs clear up within three weeks and don’t require any treatment. For more persistent coughs, see your GP so they can investigate the cause.
Source: Cough @ NHS Choices
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- Cold guide @ Boots WebMD
Excerpt: If you have a cough and cold, how long should it last? The answer, according to research evidence, is around 18 days. However, a 2013 US study found many people with a cough become concerned after about 5 to 9 days. University of Georgia experts say coughs last for longer than we think they do. People think a cough should have ended in a little over a week, but the reality is that a cough is more likely to last 2 weeks.
image by LoggaWiggler under CC0 license
