Biology Stack Exchange is a question and answer site for biology researchers, academics, and students. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Why do we have a running nose for quite some time after crying? It persists even after we stop crying. Why is it so? I have faced this always. Also, why does our nose redden on crying for long?

share|improve this question
up vote 1 down vote accepted

When you cry, you produce tears, which come out of your tear ducts. These are not only open to the eyes but also have a connection to your nose, see the image below:

enter image description here

A part of your tears runs through this connection and mixes with the mucus which is present in your nasal system making it thinner and allow it to flow more easily. If the tear flow is prolonged, the nose will produce more mucus and make your nose running for a longer time. The nose appears redder because the blood flow is increased. This is partly due to the production of more mucus and also because you repeatedly touch the nose when using a handkerchief.

share|improve this answer
Thank you for the explanatory answer. The diagram proved to be of immense help. – Shamayeta Jul 23 '14 at 18:07

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.