I am an 18-year-old. I have a distinct, localized bright red spot/patch in the inner corner of one eye (near the nose). It has been present for 3 weeks now and has not gone away or faded on its own. The rest of the white part of my eye looks normal, healthy, and clear. There is no pain at all, my vision is completely clear, and there is no thick yellow or green discharge. I haven't had any recent injuries or heavy coughing. Please let me know what could cause a persistent red spot like this, whether I need specialized prescription drops, or if there are specific home care routines I should follow. Thank you.