See the surgeons can open his/her clinic and there he/she can deal with the surgery related problems of the patients. Its not required that the surgery is required to be done but you can treat patients and can do the surgery in any other Nursing homes or Hospitals. Apart from this, the surgeons can also treat patients and prescribe medicine but its not appropriately visited by the patients for treatment of general disorders. So if you wish you can treat patients as you have completed your MBBS. After MS also you can do the same and there are no legal difficulties in it.

To know more about the career as a Surgeon, visit the link below:

https://www.careers360.com/careers/surgeon

I hope this answer helps. All the very best for your future endeavors!