Hi i am Dr Ahmed Aly thanks for using healthcaremagic site , I had gone through your question and understand your concerns .. In my point of view i think that is a kind of DVT deep vein thrombosis were a small clot prevents venous blood from going back towards the heart thus more lower level of venous blood stasis thus swelling occurs . for my patients i recommend elevating his leg ,2 aspirin pills after breakfast are effective , avoid standing or sitting for a long time and ask your physician for investigations and doppler ultrasound on your lower limb venous system Please click THANK YOU and consider a 5 star rating with some positive feedback if the information was helpful. Hope the above information helps you, Any further clarifications feel free to ask.