Hi, The most common cause of pain above the left eye going to upper scalp is indicative of a classical case of supra-orbital neuralgia. Another reason can be any vascular malformation in brain. Since you are on Coumadin, there is a possibility of bleeding in that area. Hence, consult your doctor for clinical examination. Tapping on the area of a nerve can cause shooting pain and thus defines the condition. If positive then get started on an appropriate prescription based medicine. If anything else then you will be investigated and treated accordingly. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. T. Chandrakant, General Surgeon