2.5 Week Scar from Carotid Ligation? (photo)

had tonsillectomy 3 weeks ago, 5 days after had a torrential bleeding which lead to ligation of carotid in order to control bleeding. Stitches were removed from neck few days ago. I am very worried about the scar, looks like it is opening up and time to time I get pain from it. I am applying bio-oil and a scar cream What do you recommend, What can I apply to it? Also the pulse from carotid is very visible and strong over the scar? Thank you