👉 Postcarotid is a medical condition that refers to the presence of a cyst or mass in the space between the carotid arteries, which are involved in the supply of blood to the brain. This can cause symptoms such as facial pain and discomfort, numbness or tingling sensations, and vision problems. The exact causes of postcarotid disease are not fully understood, but it is thought to be caused by a buildup of substances in the space between the carotid arteries.