Hiatal Hernia
A hiatal hernia [7] occurs when part of the stomach pushes through the hiatus of the diaphragm, the hiatus is the opening in the muscular wall of the diaphragm through which the esophagus reaches the stomach.
Hiatal hernias usually occur in most people above 50. There scarcely show symptoms and are usually left alone. Depending on the severity, it may result in heartburn, acid reflux or shortness of breath.
Most people never know they have a hiatal hernia as there is no visible bulge.
Conclusion
Hernias can show up in different locations. If you notice you have one, talk to a doctor. Surgery is the only way to repair a hernia. The decision to operate it will depend on the type and location. Strangulated hernias are dangerous and require urgent medical attention because blood supply is cut off from the affected area.
References:
[1] https://www.uofmhealth.org/health-library/aba5300
[2] https://www.niddk.nih.gov/health-information/digestive-diseases/inguinal-hernia
[3] https://www.ncbi.nlm.nih.gov/pubmed/19300219
[4] https://www.facs.org/~/media/files/education/patient%20ed/adultumbilical.ashx
[5] https://www.healthline.com/health/incisional-hernia
[6] https://www.uofmhealth.org/health-library/aba5300#aba5310
[7] https://www.uofmhealth.org/health-library/sth149947#sth149947-sec