Can a personal radio frequency device be beneficial after liposuction?

Though I don't think the power of a home device is going to be enough to do much, I recommend checking with your doctor first.  That said, the in-office RF machines do help smooth and contour following liposuction, but they aren't routinely required.  It's important you are doing home massage and that is always a good thing following liposuction.  The skin numbness and hardness are normal and will recover in time.  

I personally don't believe radio frequency after liposuction is going to do much to improve healing. The fluid/bruising is too deep for radio frequency to make a difference, especially if you’re using home devices. Ultrasound therapy or possibly Lymphatic Drainage Massage would be more likely to reduce some of the swelling in the short term. - Dr. Amron

In my opinion treatment of the skin with radiofrequency has no beneficial effect. I have experience with two separate systems and have been disappointed.