Hi, Thank you for your question. From your description of symptoms, it appears that due to clot disorder it may be leading to formation of deep vein thrombosis (DVT) that is a dysfunction of deep valves of veins. Symptoms appear as painful, burning, red, and warm leg. Sometimes DVT can lead to pulmonary embolism, when the clot dislodges from its site and travels to the lungs & appears as chest heaviness. Another possibility in your case could be a spine disc prolapse or degeneration. By the reason of that nerves from the spinal cord can be irritated causing leg/thigh pain and numbness, tingling, or weakness in the leg. Few persons also face generalized body weakness and numbness due to other nerve irritation on back. If you suffer continuous weakness and notice reduced strength of muscle bulk in leg, please arrange an appointment with a neurologist right away who will evaluate the possibilities here. Hope this information proves helpful to you. Take Care & Regards!!!
HI...I am sure there could be several diff things...one I am aware of is a condition called P.O.T.S.....which it can cause pooling of blood in the extremities as well as numerous other issues.U should take him to a dr for a full exam to determine what could be his issue.
Goos luck
"selma"