Its a red blister, just like a cold sore you would get on the mouth except it is underneath and around my right eye. There is pain in my eye, it feels sort of bruised as if i've been punched in the face. Its also very sore to touch. My eye seems to be watering a lot and sometimes my vision is a bit blurred.
Thank you for your help.
I am pretty sure it is a cold sore as i have had it quite a number of times throughout my life. I just wanted you to confirm whether antibiotics will have much effect.
Also, you did not answer my question about the hard round lump on the side of my face which always comes up when i get these cold sores.