If not specified, the term hypertension usually refers to high blood pressure in your arteries.
Then, your veins bring the blood back to the heart for more oxygen.
With more blood pooled in your legs, the blood pressure inside your veins increases.

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Often this happens because the valves in the veins of your legs arent working as well as they should.
The valves normally keep blood from flowing backward.
Venous hypertension can worsen damage to the valves in your veins, so it works as a cycle.

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If you have one, you likely have both.
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Symptoms
Symptoms arise gradually.

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At first, venous hypertension may not cause any symptoms at all.
You might also developvenous ulcers, irregularly shaped sores that dont heal well.
It can cause visible changes to your veins and result in symptoms like heaviness and swelling in your leg.
If more severe, venous hypertension can put you at risk of leg ulcers and infection.
Check your feet and legs daily for ulcers or signs of infection like warmth or redness.
Getting prompt medical attention is key to help prevent complications.
Davies AH.The seriousness of chronic venous disease: a review of real-world evidence.Adv Ther.
2023;15(4):e38123.
doi:10.7759/cureus.38123
National Library of Medicine.