The choice between gastric sleeve surgery and gastric bypass depends on individual factors. The sleeve is less invasive and focuses solely on restricting stomach size, while the bypass alters both stomach size and digestive processes. Bypass surgery often results in more weight loss but comes with higher risks of malabsorption and complications.

Sleeve banding combines two bariatric procedures: the gastric sleeve and an adjustable gastric band. It is a less common technique used to enhance the weight-loss results of the sleeve by adding additional restriction through the band. However, complications from the band have made it less favorable in recent years.

Gastric RNY, or Roux-en-Y gastric bypass, remains one of the most effective surgical options for treating obesity. By reducing the size of the stomach and bypassing a portion of the intestines, patients experience a significant reduction in hunger and an inability to eat large meals. Gastric RNY can lead to rapid weight loss and improvement or resolution of obesity-related conditions such as type 2 diabetes, sleep apnea, and hypertension.

A sick tummy feeling refers to nausea, which can have many causes, including gastritis, food poisoning, or acid reflux. Depending on the severity, nausea may be treated with antacids, dietary adjustments, or medications like anti-nausea drugs.

Sleeve gastrectomy is a common type of bariatric surgery where approximately 75-80% of the stomach is removed, leaving a smaller, tube-like stomach or "sleeve." This surgery is irreversible and promotes weight loss by limiting the amount of food the stomach can hold and reducing the production of ghrelin, the hormone responsible for hunger. The procedure has gained significant popularity in Turkey due to its lower cost, experienced surgeons, and advanced medical facilities.