After having the session, there are some people who may experience a reaction.
This is an "improvement reaction" or "cleansing reaction" and may include symptoms such as cold feeling, perspiration, diarrhea, tiredness, temporary rash, gas release, etc...

Each person's reaction-time is different, but this is natural reaction as the body starts to eliminate the waste. Drink lots of water and try to get rest and sleep if you need.