Thanks for your reply. I went back to Gp. Leg still the same. Will be going back again end of week.
Yes, it is possible that you have thrombophlelbitis which can travel along a vein if not under control. However, since you also had sciatica in the past, the pain can also be due to pinched nerves. In thrombophlebitis, it is not necessary that you will see any swelling or discoloration. However, usually there is pain along the course of a vein. Sitting in a posture for prolonged periods of time can cause either of these problems. Since a confirmed diagnosis cannot be given on net please consult your doctor regarding this. Hope this helps. Take care!
The medical advice given should not be considered a substitute for medical care provided by a doctor who can examine you. The advice may not be completely correct for you as the doctor cannot examine you and does not know your complete medical history. Hence this reply to your post should only be considered as a guiding line and you must consult your doctor at the earliest for your medical problem.