Ive been getting random bruises on my right leg for the past year. Is there any reason why its happening? And is it bad/ deadly?

Answer 1

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Probably not deadly, but when you have a chance, get a blood test to have your platelets (clotting factor) checked.

Search: thrombocytopenia

Edit: You could be bumping into something without realizing it. This is typical of someone who has low blood platelets, an insignificant bump or grazed lightly across the edge of a table, causing bruising. There are several underlying causes..

Answer 2

Since it's happening on only one leg, the cause could simply be bumping into something without realizing it. An organic, medical problem would most likely produce bruises elsewhere, too.

But there COULD be a medical problem, so see a doctor and have some testing done.