A general surgeon is a medical doctor who specializes in the field of surgery and is trained to perform a wide range of surgical procedures to treat a variety of conditions and diseases. They are trained to diagnose and treat conditions involving the skin, soft tissues, bones, and organs of the body, including the digestive system, the abdominal organs, the breast, the skin, and the endocrine system.

Some of the specific responsibilities of a general surgeon include:

• Diagnosing and treating conditions that require surgical intervention
• Performing surgical procedures such as appendectomies, gallbladder removals, hernia repairs, and colon resections
• Performing diagnostic procedures such as biopsies and endoscopies
• Monitoring patients' conditions before, during, and after surgery and managing any complications that may arise
• Coordinating care with other healthcare professionals, such as primary care physicians and specialists, to provide comprehensive care for patients
• Providing education and counseling to patients and their families about surgical options and post-operative care

General surgeons typically work in hospitals, clinics, or private practice and may also conduct research in the field of surgery. They may also be responsible for providing emergency care in some cases.

General surgeons treat a wide range of conditions and diseases that require surgical intervention. Some of the most common conditions and diseases treated by general surgeons include:

1. Abdominal conditions: General surgeons treat conditions such as appendicitis, hernias, gallbladder disease, and colon cancer.
2. Gastrointestinal conditions: General surgeons treat conditions such as acid reflux, ulcers, and inflammatory bowel disease.
3. Breast conditions: General surgeons treat conditions such as breast cancer, breast cysts, and lumps.
4. Skin conditions: General surgeons treat conditions such as skin cancer, moles, and cysts.
5. Endocrine conditions: General surgeons treat conditions such as thyroid and parathyroid disorders and adrenal tumors.
6. Trauma: General surgeons are also responsible for treating injuries and wounds resulting from accidents and violence.
7. Vascular conditions: General surgeons are also trained to treat conditions involving the blood vessels, such as varicose veins and aneurysms.
8. Bariatric surgery: General surgeons perform weight loss surgery such as gastric bypass and sleeve gastrectomy for morbidly obese patients.

It's worth noting that general surgeons may also treat other conditions and diseases not mentioned here and that the specific conditions and diseases treated by a general surgeon may vary depending on their subspecialty or the facilities they work in.