Reduced ROM and striations in arms 4 weeks post arm lipo, is this a concern?

Hi,  I have done many procedures to the upper extremities and yes there are some post-op issues,  but most are not significant to change your life style.  Remember that you will have some swelling and tightness to the area that was treated.  The tightness and swelling usually resolve within the first month or so.  You may have some irregular areas which will improve with some post massage.  You can also have some numbness and tingling to the treated area which can last for up to 6 months.  Overall Vaser Lipo is one of the best procedure to remove fat from your body,  but nothing comes without zero side effects or complications.

Hello,
Thank you for your question. I agree with my colleagues that you reduced mobility is likely due to a combination of swelling and disuse. I recommend you increase your physical activity as tolerated and consider consulting a physical therapist if you are unsatisfied with your progress. 
Regarding the striations, they may be normal post-procedural changes that will resolve with time. It is difficult to diagnose without images.
Best wishes,
Dr. Moein

So I would recommend stretches and some ultrasound and manual lymphatic drainage to facilitate your recovery.