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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Is The Cause For Swollen, Bruised And Painful Knee? No Injury

I don't know what's going on but I don't remember hitting my knee or anything. Yesterday I woke up to go to to work and I kneel down to get my shoes. Once my knee touched the floror it hurted so bad.. Its swollen and red a a little bump with a bruise . It feels.like the pain getting worst . Such as bending it and kindah hurts to walk. Any idea wata going on?
Thu, 26 Dec 2013
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Dermatologist 's  Response
Hi,

I can understand your concern for swollen, bruised and painful knee.

Regarding the problem of bruises which we call medially as "purpuric or ecchymotic spots" is common condition seen due to multiple causes.

In your case it can be a normal phenomenon or can be due to other causes.

To guide you elaborately- Bruise or the purpura is simply formed due to extravasation and collection of red blood cells from the vessels under the skin. This results in formation of reddish spots which we call as Bruise in simple language. It can be due to :

1. Due to trauma to the small blood vessels of the skin.

2. Due to some problem in the platelets ( the cells which prevents the extravasation of red blood cells from the vessels and forms the clot).

3. Due to problem with the coagulation factors which helps in repair of the injury to blood vessels and helps in clot formation.

For the best part of the diagnosis there are simple tests of platelet function and coagulation factors done routinely in all the simple laboratories to rule out the exact cause of the problem. If these tests are normal then you can rest assured and relieve your tensions regarding the rash. Otherwise also if the test are abnormal then also can be very well treated without any problem.

Take care.
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Internal Medicine Specialist Dr. Sudhir's  Response
With those symptoms possibility of infective arthritis seems likely. This needs clinical evaluation. Meanwhile take analgesics for pain. Feel free to ask more.
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What Is The Cause For Swollen, Bruised And Painful Knee? No Injury

Hi, I can understand your concern for swollen, bruised and painful knee. Regarding the problem of bruises which we call medially as purpuric or ecchymotic spots is common condition seen due to multiple causes. In your case it can be a normal phenomenon or can be due to other causes. To guide you elaborately- Bruise or the purpura is simply formed due to extravasation and collection of red blood cells from the vessels under the skin. This results in formation of reddish spots which we call as Bruise in simple language. It can be due to : 1. Due to trauma to the small blood vessels of the skin. 2. Due to some problem in the platelets ( the cells which prevents the extravasation of red blood cells from the vessels and forms the clot). 3. Due to problem with the coagulation factors which helps in repair of the injury to blood vessels and helps in clot formation. For the best part of the diagnosis there are simple tests of platelet function and coagulation factors done routinely in all the simple laboratories to rule out the exact cause of the problem. If these tests are normal then you can rest assured and relieve your tensions regarding the rash. Otherwise also if the test are abnormal then also can be very well treated without any problem. Take care.