Eyelid droop after eyelash irratation on eye

Around 1 month ago I was having issues with my eye. It was watering, very sensitive & my eyelid was less open than usual. I went to see a specialist & they removed 3 ingrown eye lashes. Soon after this, the watering issues etc went away. My eyelid has opened up a bit more, but has not returned to how it was , making it slightly droopy , which was never like this before. Do you know why this could be? Or how long before eyelid returns to normal position..?