Gastritis is an inflammation of the stomach lining that can be acute or chronic. Acute gastritis is caused by factors like hot liquids, chemicals, drugs, or infections and lasts a few hours to days. Symptoms include nausea, vomiting, and abdominal pain. Chronic gastritis is long-lasting damage to the stomach lining that can be caused by conditions like H. pylori infection, alcohol abuse, or thyroid disease. It presents with symptoms such as weight loss, dyspepsia, and melena stool. Treatment focuses on relieving symptoms, promoting healing, and addressing any underlying causes through medications, fluids, nutrition, and lifestyle changes. Complications can include ulcers, bleeding, obstruction, or