Everyone has galls stones of all shapes and sizes and they take a long time to form. Being overweight (high cholesterol in the bile) can lead to developing more gallstones.
Going on a diet will not make them move as such if the diet and food intake is adequate – fast weight loss, not eating solid food and surgery for weight loss MAY create a problem in this area.
The HCG is not rapid weight loss as such as it, via the ingredients, helps many parts of the body to balance in healthy ways – also the nutrients in the patch will not lead to excessive bile production.
Though as in any diet you will detox backed up toxins in the bowel, intestines and stomach and reduce content in the fat calls. This is very positive and healthy.
Check with your doctor if you have real pain – but just dull aches that come and go is normal while releasing unhealthy fat. Your body will tell you if there is a real problem.