The condition is known as DVT or deep vein thrombosis.
DVT typically occurs in the legs and can cause pain and swelling and can be fatal if a blood clot dislodges and travels into the lungs.
The new study found patients with low iron levels were at increased risk for blood clots but those who took iron supplements did not have a higher risk. The findings of this study are published in the journal Thorax.
Experts say the results suggest that treating an iron deficiency may help prevent DVT in the general population.
