0 Question Asked: December 17, 2019In: BiologyWhy do our eyes sting when we get tired?0Why do our eyes sting when we get tired?In: Biology ShareFacebook 3 AnswersVoted PrionBacon Added an answer on December 17, 2019 at 4:21 pm Our tear ducts produce a combination of liquids and oils to lubricate and protect the surface of the eye every time we blink. The quality of these tears goes down the longer we stay awake.With lower quality tear film, parts of our eyes are exposed to the air and any irritants in it, causing it to become red and inflamed.Closing our eyes during a full night’s rest allows the tear ducts to recover back to producing good quality tears.0Reply Share ShareShare on FacebookShare on TwitterShare on LinkedInShare on WhatsApp [deleted] Added an answer on December 17, 2019 at 4:07 pm [removed]0Reply Share ShareShare on FacebookShare on TwitterShare on LinkedInShare on WhatsApp Fapitalismm Added an answer on December 17, 2019 at 4:43 pm **Please read this entire message**—Your submission has been removed for the following reason(s):* ELI5 requires that you *search the ELI5 subreddit for your topic before posting*.There are no exceptions to this rule.Users will often either find a thread that meets their needs or find that their question might qualify for an exception to rule 7.Please see this [wiki entry](http://www.reddit.com/r/explainlikeimfive/wiki/how_to_search) for more details (Rule 7).— If you would like this removal reviewed, please read the [detailed rules](https://www.reddit.com/r/explainlikeimfive/wiki/detailed_rules) first. If you still feel the removal should be reviewed, please [message the moderators.](http://www.reddit.com/message/compose?to=%2Fr%2Fexplainlikeimfive&subject=Can%20you%20review%20my%20thread?)0Reply Share ShareShare on FacebookShare on TwitterShare on LinkedInShare on WhatsAppLeave an answerLeave an answerCancel reply Attachment Select file Browse Featured image Select file Browse What is the capital of UK? ( London ) Save my name, email, and website in this browser for the next time I comment.