It looks like that you have been bitten by an insect. You may require oral anti-biotics and anti-allergics like levocetrizine. It would be better to get yourself examined by an ophthalmologist. Swelling in this area is common owing to the looseness of the tissues. It is likely to be inflammatory as there is pain on touching it. I hope it helps.
Follow-up questions are most welcome.
There is no puffy swelling. There is a dent as in indentation as if some took their thumb and pushed in part of skull
It would be better to get an examination. Pain is an indication of inflammtion in this area. It could be because of an insect bite or something. A dent can be caused in this area if swelling is present as the tisuue in this area is loose. However, it would be safer to get it examined. Thanks.