How long should it take for the "hard knots" to go away? What is the treatment for getting rid of the knots?

Sounds like you had some areas that collected the heat and hardened. We recommend massaging those areas immediately after treatment and continuing until it fully breaks down. I would still massage those areas daily even after 8 months because you should be able to get those areas to soften. Also, follow up with the physician who treated you.  Hope this helps.

I suggest starting massage and z wave / cellutone treatments with venus legacy or exilis.  They should improve the knots.  Go to a reputable body shaping physician.  Best, Dr. Emer.

   The Vanquish uses a unique radio frequency energy to destroy excess fat cells under the skin.  The inflammatory reaction is normal and is the body's way of disposing of the fatty debris.  Sometimes the reaction is prolonged and lumps and tenderness ('panniculitis') can be experienced.  The problem will usually resolve in time but can be helped by anti-inflammatory over the counter meds such as ibuprofen, warm compresses, and deep tissue massage.  The new treatment with tissue sound waves called Cellutone can be beneficial as well as the Exilis Ultra which uses a combination of ultrasound and radio frequency to treat these problematic areas. 

Daily massage to the areas should be helpful. Recommend applying Cellutone or Z-wave (acoustic wave therapy) to the areas on a prescribed schedule, to significantly reduce the knots.