More than 80% of patients with Cushings syndrome develop hypertension., which is accompanied by distinct symptoms of the syndrome, such as central obesity, lipodystrophy, moon face, sweating, hirsutism and anxiety.Neuroendocrine tumors are also a well known cause of secondary hypertension. Pheochromocytoma (most often located in the adrenal medulla) increases secretion of catecholamines such as epinephrine and norepinephrine, causing excessive stimulation of adrenergic receptors, which results in peripheral vasoconstriction and cardiac stimulation. This diagnosis is confirmed by demonstrating increased urinary excretion of epinephrine and norepinephrine and/or their metabolites (vanillylmandelic acid). Other secondary hypertension
Hormonal contraceptives
Neurologic disorders
Obstructive sleep apnea
Liquorice (when consumed in excessive amounts)
Scleroderma
Neurofibromatosis
Pregnancy: unclear cause. Cancers: tumours in the kidney can operate in the same way as kidney disease. More commonly, however, tumors cause inessential hypertension by ectopic secretion of hormones involved in normal physiological control of blood pressure. Drugs: In particular, alcohol, nasal decongestants with adrenergic effects, NSAIDs, MAOIs, adrenoceptor stimulants, and combined methods of hormonal contraception (those containing ethinylestradiol) can cause hypertension while in use. Heavy alcohol use
Steroid use
Nicotine use. Malformed aorta, slow pulse, ischemia: these cause reduced blood flow to the renal arteries, with physiological responses as already outlined. Coarctation of the aorta
Atherosclerosis
Anemia: unclear cause. Fever: unclear cause. White coat hypertension, that is, elevated blood pressure in a clinical setting but not in other settings, probably due to the anxiety some people experience during a clinic visit. Perioperative hypertension is development of hypertension just before, during or after surgery. It may occur before surgery during the induction of anesthesia; intraoperatively e.g.
The differential diagnosis of a renal tumor in a young patient with hypertension includes Juxtaglomerular cell tumor, Wilms tumor, and renal cell carcinoma, all of which may produce renin. Hypertension secondary to other renal disorders
Chronic kidney disease
Kidney disease / renal artery stenosis –  the normal physiological response to low blood pressure in the renal arteries is to increase cardiac output (CO) to maintain the pressure needed for glomerular filtration.Here, however, increased CO cannot solve the structural problems causing renal artery hypotension, with the result that CO remains chronically elevated. Renal segmental hypoplasia (Ask-Upmark kidney)

Hypertension secondary to endocrine disorders
Neurogenic hypertension – excessive secretion of norepinephrine and epinephrine which promotes vasoconstriction resulting from chronic high activity of the sympathoadrenal system, the sympathetic nervous system and the adrenal gland. The specific mechanism involved is increased release of the "stress hormones", epinephrine (adrenaline) and norepinephrine which increase blood output from the heart and constrict arteries.