What Caused This Raised Tissue After my Neck Lift? (photo)

The neck lumps and irregularities you are experiencing are most likely the result of blood collecting under the skin and your body's reaction to it.  It appears that your PS is handling the situation appropriately

Your photo is very helpful, thank you.  A direct physical exam would be best to evaluate this and your plastic surgeon is in the best position to know what was done during the surgery.   Some common causes of appearances like this are collections of blood or fluid under the tissues, an infection in the tissues or residual areas of fat.  For now I would try the most conservative approach and let the tissues heal, mature and soften.  External massage and possibly ultrasound treatments may help to hasten the softening.  Antibiotics can be used if there is strong concern about an infection.  Steroids should be used carefully due to the possibility of tissue thinning.  Follow up closely and frequently with your plastic surgeon.