A hernia is defined as an abnormal protrusion of body content through a potentially weak surface. Hernia consists of three parts: neck, sac, and contents. The content of a hernia can be an organ of the body, any vessel, or mucosa only. A hernia is classified based on its size, composition, and character.
Hydrocele is a type of swelling usually filled with fluidity and can occur in any body part. A frequent site of occurrence is the scrotum. Fluid lies inside a sheath surrounding the scrotum.
Four key differences:
1) Hernia is often associated with obesity, muscular dystrophy, and an age greater than 45, although congenital hernia exists. Hydrocele is related to an infection in the scrotum, chronic lymphatic filariasis, radiation therapy, or an injury of the scrotum. Hydroceles are seen in younger adults 20 years and above and in older people.
2)The hernia has a wide neck so the viscera can herniate, while hydrocele has a narrow neck so only the peritoneal fluid can collect only
3) A hernia is often completely reduceable, but hydrocele is fluctuant and transluminal
4) Ultrasonography shows only fluid in hydrocele, while hernia contents in the case of hernia