Dear japdip, I would think that it is possible for the latest surgery to have some interference with the lymph drainage, but without details of the extent of surgery, location of the extension of
incisionIncision for abdominal laparoscopy
Incision for lung biopsy
Incision for pleural tissue biopsy
Incision for thyroid gland surgery it's difficult to say for sure. It is likewise difficult with the limited information to directly advise. I am assuming that your surgeon is aware of the swelling and there is no clinical problem (other than those noted above) that needs medical intervention? Is this edema causing other symptoms such as pain or shortness of breath? If so re-evaluation should occur. If the problem is strictly the edema, evaluation by a physical or occupational therapist or lymphedema specialist might help to give you additional suggestions. For example, making sure to optimize the mobility of your upper body on the effected side without overdoing (which could lead to more edema).
For more comprehensive information about lymphedema prevention and treatment we have information on our Cleveland Clinic Website. Which is www.clevelandclinic.org once there, click on Health Information Center, then type in lymphedema.