Stomach is the first part of digestive system, where food digestion starts. Food passes through food-pipe & enters stomach. Any operation performed on stomach is called stomach surgery.
Stomach surgery is usually performed by gastrosurgeon, who specializes in this field, also called GI Surgeon.
Immediately after the operation, the patient is shifted to recovery ward or an ICU. Patient will not be allowed to take orally from 1 to several days, depending upon the judgement of gastrosurgeon. Till the time patient resumes diet, he will be supplemented with artificial nutrition via a venous line.