Hi dr. i woke up this morning with my left eye swollen on the lower side. it feels like theres a particle inside. what is causing it and how do i fix this?

Foreign body or Stye: Sounds like it could be a foreign body in your eye, or a Stye. when you look at your eye, a Stye would show up as a reddened swelling of your eyelid, with a little bump inside of it. Use warm compresses to alleviate the discomfort. If there is a foreign body, you should try an eyewash to remove it. If the discomfort persists, you may want to see a Dr to help you remove the foreign body