Following are the common causes of secondary hypertension

§ Renovascular disease.

§ Coarcation of the Aorta.

§ Pheochromocytoma.

§ Chronic kidney disease.

§ Cushing syndrome.

§ Primary hyperaldosteronism.

§ Thyroid disease.

§ Obstructive sleep apnea.

§ Congenital adrenal hyperplasia.