Should I avoid massaging upper abdomen after lipo and fat graft?

It would not be usual advice to massage either an area of liposuction or of fat graft. Grafted fat is dependent on regrown of tiny blood vessels into it, and massage could disrupt these and compromise graft survival, whilst massage of the areas that have had liposuction may encourage and prolong swelling, I would contact your surgeon about the lump you have noticed and get their advice based on their intimate knowledge of the surgery you have undergone. 

I address this on an as needed basis and take into consideration patient discomfort, the extent of swelling and weight gain status. If there is considerable discomfort, massage may not be tolerated. If there is a great deal o swelling, compression should be addressed in addition to the need for massage. If there is a considerable amount of weight gain, a small amount of a water pill can be helpful also.