whta is a good excerse if you develope alymphedema after surgery

Are you referring to lymphedema? What specifically are your symptoms: do you have swelling in one, or both, of your arms and/or legs?

What type of surgery did you have? Has your doctor ruled out infection as being the cause of the swelling? What treatment(s) are you currently using, for your initial/primary conditions, as well as for the lymphedema?

Lastly, has your doctor suggested that you use exercise to help treat your lymphedema? If so, the Mayo Clinic has these suggestions for treatments:
"Exercises. Light exercises that require you to move your affected arm or leg may encourage movement of the lymph fluid out of your limb. These exercises shouldn't be strenuous or make you tired. Instead, they should focus on gentle contraction of the muscles in your arm or leg. Your doctor or a physical therapist can teach you exercises that may help."

Also, massage might be beneficial, as well as other treatment options:
"Massage. A special massage technique called manual lymph drainage may encourage the flow of lymph fluid out of your arm or leg. Manual lymph drainage involves special hand strokes on your affected limb to gently move lymph fluid to healthy lymph nodes, where it can drain. Massage isn't for everyone. Avoid massage if you have a skin infection, active cancer, blood clots or congestive heart failure. Also avoid massage on areas of your body that have received radiation therapy."

You can read more at: http://www.mayoclinic.com/health/lymphedema/DS00609/DSECTION=treatments-and-drugs.

All of these suggestions need to first be approved by your doctor!