My LO developed a small swell at the corner of her eye. Wasn't there this morning but just developed over the day... It can't be an insect bite as we were carrying her the whole day.. Is it a cause for concern?

Can't really see which part is swollen from the picture. Could it be a blocked tear duct? Or an allergy to pollen or dander? Best to go to the doctor for an affirmative answer. In the meantime, you can place a damp, cool washcloth on your baby's closed eyes to help reduce swelling.