Hi,
Welcome to the forum. I am glad to help you out. The blood pressure does rise a little when one stands or walks from the lying down position.
Iâll suggest consulting a cardiologist and getting yourself evaluated to look for a cause of hypertension. In young hypertensives, we need to rule out secondary hypertension which means that thereâs an underlying cause of hypertension which can be cured compared to primary hypertension seen in the elderly in which thereâs no underlying cause. Common renal causes are renal artery stenosis, chronic renal failure etc. Tumors of the adrenal gland can also cause the same and the assessment needs to be done by doing a urine VMA levels & CT scan abdomen. Thyroid hormone levels also should be checked which you have already done.
Itâs extremely difficult to make an online diagnosis and for the same will suggest you to consult a cardiologist/physician. I sincerely hope that helps. Take care.