Dear patient thank you for your question. Here are a few causes of spontaneous bruising and some tips to help you figure out what you migh t have 1) Blood disorder: a. Von willibrand s disease/ Haemophilia: A blood disorder due to lack of coagulation factors. It results in spontaneous bruising and is easy to rule by a simple blood test called COAGULATION PROFILE. b. Thrombocytopenia: Low platelet count can result in such symptoms. A coagulation profile will help diagnosing this condition as well c. Leukemia: My intention is not to scare u but practically speaking it is a possibility especially if u feel fatigued and have bone pain or headaches. Please get a complete blood profile done 2) Liver disorder Most of your coagulation factors come from your Liver hence a Liver disorder mostly cirrhosis can result in such symptoms. Get a LFT done. Yellowing of your eyes/jaundice may hint at a Liver disease however it is not a rule 3) Vitamin deficiency: Vitamin C and b12 deficiency can result in bruising as well. The test is time consuming and expensive so just take a multivitamin tablet every day and see how u feel after 2 weeks 4)Grace s disease: This is a thyroid disorder and may be accompanied by excessive sweating feeling hot increase appetite yet wt loss. A thyroid profile is warranted. More common in females 5) Excessive medication/ Injury: If you are taking any medication please read the label to see if hematoma or bruising is a mentioned side effect. Also if you go to the gym or run a lot this can happen I strongly urge you to discuss this with your go and reach a diagnosis. in the meantime for your pain here is what you can do 1) Ibuprofen 800mg twice a day 2) Cold compression over the bruising 3) Elevation of the leg while sitting down Hope this helped.