Head rushes and abdominal discomfort

Hi, welcome to the ehealth forum and I am glad to help you.
You seem concerned by elevated BP on and off, the headrushes more like a tingling in the head sometimes linked with hot and cold sweats, abdominal discomfort and a bit of episodic diarrhea. You have also made a mention of elevated epinephrine in 24 hour urine sample.
With the given history the possibility of pheochromocytoma can be considered in your case. MRI scan can be used to find the tumor as it is more sensitive than CT scan. CT abdomen is good for tumors >1 cm. Surgical resection of the tumor is the treatment of choice and usually results in cure of the hypertension. Careful treatment with alpha and beta blockers is required preoperatively to control blood pressure and prevent intraoperative hypertensive crises.
Other possibilities that need to be considered include hyperthyroidism, hypoglycemia and porphyria.
You must continue follow up with your personal physician for the definitive diagnosis and treatment as the same is not possible online.
Hope this helps.Take care.
Note: This post is not to emphasise final diagnosis as the same cannot be made online and is aimed just to provide medical information and no treatment suggested above be taken without face to face consultation with health care professional/