Is it normal to gain 10 lbs in less than a month after CoolSculpting?

Hello, thanks for your question regarding weight gain following CoolSculpting.  Your weight gain would be entirely independent of your CoolSculpting procedure.  With CoolSculpting you can be expected to lose around 20-22% of the the fat cells in the area treated.  Although CoolSculpting  is not a procedure for weight loss, it most certainly would not cause you to gain weight.  So to answer your question, no, weight gain following CoolSculpting would not be considered a typical result of the procedure.  

It is very unlikely to gain weight after Coolsculpting unless you have been over eating or have thyroid/hormonal imbalances. Sometimes the area is slightly inflamed post treatment, which is actually a good sign, try not to take anti inflammatory pain relief and trust in the process. Cold or warm compresses can help with any discomfort experienced. 
If weight gain persists with no cause, please visit your GP for a check up. 
Always happy to answer any other questions.