<s>[INST] Hi, may I answer your health queries right now ?  Please type your query here...I am a 44 yr old male and have had issues with my back in the past , but this time it is different. My lower back is brusied and very vainy looking, worst case senarial would be [/INST] Hi Welcome to Chat Doctor I have gone through your query and understand your concern. As you have mentioned bruise of your back, there is no pain or other issues. I think you should investigate for blood clotting disorder and platelet count to see the causes of bruise. Your back is very many, it can be studied by ultrasonography and MRI of the region. Treatment can be after investigation and knowing the cause. You can discuss with your doctor about it. Hope your query get answered. If you have any clarification then don't hesitate to write to us. I will be happy to help you. Wishing you a good health. Take care. </s>