1. Introduction A constant feeling of sand under the upper eyelid is most frequently caused by giant papillary conjunctivitis, microscopic corneal abrasions, or chronic dry eye disease. It can also indicate a trapped physical particle or a misdirected eyelash scratching against the sensitive tissues. The sensation of grit in the eye is a powerful neurological … Read more
1. Introduction The sensation of having a hair or a piece of grit in the eye when nothing is physically there is medically known as a foreign body sensation. This highly uncomfortable feeling is typically caused by microscopic damage to the superficial layer of the cornea or severe disruption of the tear film. When the … Read more
1. Introduction A sharp stinging pain under the fingernail while digging in garden dirt is primarily caused by microscopic foreign bodies, such as jagged soil particles, sharp sand grains, or tiny wood splinters, forcing their way into the highly innervated tissue known as the hyponychium. This specific region beneath the distal edge of the nail … Read more