1.0Reference.comhttps://www.reference.comStaff Writerrich600338<blockquote class="wp-embedded-content" data-secret="HQHEB6HSIm"><a href="https://www.reference.com/world-view/knees-hurt-bend-9a6271a1d693e1fa">Why Do My Knees Hurt When I Bend Them?</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.reference.com/world-view/knees-hurt-bend-9a6271a1d693e1fa/embed#?secret=HQHEB6HSIm" width="600" height="338" title="“Why Do My Knees Hurt When I Bend Them?” — Reference.com" data-secret="HQHEB6HSIm" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); </script> https://www.reference.com/wp-content/uploads/sites/2/2023/12/cf31cf9d17ca08c2f615a6717941f09b.jpg1400788WebMD explains that pain that occurs when bending the knees is a common symptom of bursitis, a condition in which the sac of fluid that protects the knee joints becomes inflamed and irritated due to repeated bending, injury or overuse. Bursitis that is caused by kneeling is often referred to as "housemaid's knee" or "preacher's knee."