My son has a rash on the top of his eyelid and its the same color of his skin and then in the corner of his eyelid at the bottom its swollen?

See Your Doctor. The rash that you describe could have numerous causes such as: bug bite, eczema, infection, and more. More info is needed such as the duration, recent illness, associated symptoms (eg. itching, pain, etc.), your child's medical history, and more. It is important to note that diagnosis of a rash is challenging without visual inspection. See your child's doctor for correct diagnosis and treatment.