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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Expanding Bruise On Shin After Hitting?

Hi, I am on blood thinners. I hit my shin pretty hard on a bike 6 days ago. The bruise was less than the size of a tennis ball but now has grown to 4 times that size and keeps expanding. I can tell because the older part is yellow but the outside keeps getting blue and purple. Should I see my doctor?
Wed, 26 Aug 2015
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Orthopaedic Surgeon,  's  Response
Hii there.

A bruise usually goes through colour changes over time.It can change from red colour initially to yellowish brown by end of the week..But it is expected to decrease in size after the first two days.Its my opinion that since you are on blood thinners, an increase in size of bruise should be reviewed and seen by a doctor in perso, as blood thinners can cause accumulation of blood in the area of bruise.U might need blood tests to review your parameters.In the mean time application of pressure by a crepe bandage can help control the swelling.

It is best if you can meet a physician and get the swelling and colour changes reviewed by her/him.

All the best. Regards.
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What Causes Expanding Bruise On Shin After Hitting?

Hii there. A bruise usually goes through colour changes over time.It can change from red colour initially to yellowish brown by end of the week..But it is expected to decrease in size after the first two days.Its my opinion that since you are on blood thinners, an increase in size of bruise should be reviewed and seen by a doctor in perso, as blood thinners can cause accumulation of blood in the area of bruise.U might need blood tests to review your parameters.In the mean time application of pressure by a crepe bandage can help control the swelling. It is best if you can meet a physician and get the swelling and colour changes reviewed by her/him. All the best. Regards.