Can Covid 19 Cause Blood Clot? - Fast&Up

Can Covid 19 Cause Blood Clot

Several studies indicate that COVID - 19, which is a disease caused by SARS - CoV - 2 can cause blood clots in approximately 30% of critically ill patients.

In this piece of article, we would look at the link between coronavirus and blood clots and discuss some potential treatments or preventive measures as well.

Can Covid 19 Cause Blood Clot

But before we jump off to blood clot and the role of Covid 19 in the same, let us understand a few basic things about blood clot.

What is a blood clot?

Blood clotting is a body’s natural way to respond to the injury. It occurs when blood in volume changes to semi solid state to prevent excessive blood loss. There are several chemical reactions that happen which facilitate such changes.

Blood clots occurring deep inside the vein are extremely dangerous. As they may not dissolve on their own and they can stop blood flow. Which can be fatal. In some situations, clot also breaks off and travels to another part of the body. This is known as embolus.

What are symptoms of blood clot?

  • Cough
  • Coughing up blood
  • Throbbing pain in the limbs
  • Chest pain
  • Sudden breathlessness
  • Swelling, skin darkening and warmth around the clotting area

Why Covid -19 can cause blood clots?

The reasons behind blood clot generation is still unknown when it comes to covid -19. However studies published in the journal The Lancet Haematology, helps in explaining the reason. Study analysed various markers associated with clotting.

The markers were associated with activation of the cells and platelets. Both the endothelial cells and platelets are important for the clotting process.

Following are the mechanisms proposed for the blood clotting.

  • The virus invades cells and directly and damages endothelial cells, triggering blood clot mechanism
  • Immune response also might result in increased clotting
  • An increase in the inflammatory response by immune system might also result in activating clotting

How to reduce the risk of blood clots?

  • Stay active
  • Lose weight if overweight
  • Avoid smoking and alcohol consumption
  • Know medication side effects
  • Hydrate well


We hope that this article helps you understand the risk associated with Covid -19 and blood clots and clears some myths surrounding the same. The only way to stay healthy is to follow guidelines shared by authorities and vaccinate.

To know more about Covid recovery and vaccination, visit

Neel Visaria

-Expert and Writer