Brief Answer:
You need an evaluation and blood tests

Detailed Answer:
Hi, thank you for using Healthcare Magic. Random bruising can be from a variety of conditions, and if it is spontaneous, occurring without any injury, it could indicate a significant problem with your platelets or clotting factors in the blood. Certain medicines (eg, aspirin, Plavix, Coumadin, others) can also cause it.

You should get an appointment promptly with your doctor for a complete history and physical. The doctor will then know what specific tests need to be ordered to figure it out. Some possibilities include problems with your liver, bone marrow, an enlarged spleen, a clotting factor deficiency, a reduced platelet count from particular infections or idiopathic conditions, collagen vascular diseases such as lupus or vasculitis, leukemia, radiation poisoning, alcohol poisoning, and a whole slew of other things.

As you are certainly aware, some of these things can be quite serious and may require early treatment. So contact your doctor right away. S/he may want to order a basic blood panel of tests before your visit to get a quick start on this.

Hope this answers your query. If you have further questions, I would be happy to answer them.

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