Hernia is a swelling, which you can see or feel. Commonly it occurs in groin (area between abdomen & thighs) when it is called Inguinal Hernia. It can be on the right side, left side or both sides. At times, it can also be around navel when it is called Umbilical Hernia. When it occurs near previously operated scars on the abdomen, it is called an Incisional hernia. There are other types of Hernia like, Femoral, Obturator, Spigelion, Lumbar etc., but they are rare.
The swelling usually appears on standing or coughing & disappears when you lie down.
Hernia can occur at all ages from birth till old age, though commonly it occurs in childhood & above 40 years.
Hernia is usually painless, but sometimes there is mild pain. That is the reason, people ignore hernia.
Hernia is a hole in the muscle, through which abdominal contents like intestine pop out.
Every hernia has a potential chance of complication. Sometimes, when more contents slide through, the contents cannot return back. These intestines then get obstructed & can become gangrenous. This complication, if not operated in few hours, can endanger life.