🟢 Gallbladder: Why Do Gallstones Form?
The gallbladder is a small organ that many people ignore until something goes wrong.
Gallstones are one of the most common digestive problems, yet most people do not understand what the gallbladder does or why stones form in the first place.
This illustration is a simplified visual map for educational purposes, not a medical diagram.
🫓 What Is the Gallbladder?
The gallbladder is a small, pear-shaped organ that stores bile, a fluid that helps digest fat.
It:
- Sits under the liver on the right side
- Stores bile made by the liver
- Releases bile into the small intestine when you eat
- Helps break down fats in food
Without a gallbladder, the body can still digest fat, but the process becomes less efficient.
What Are Gallstones?
Gallstones are hardened deposits that form inside the gallbladder.
They can be as small as a grain of sand or as large as a golf ball.
Most gallstones are made of:
- Cholesterol (the most common type)
- Bilirubin (a waste product)
- A mixture of both
Many people have gallstones without knowing it.
Why Do Gallstones Form?
Gallstones form when the balance of substances in bile changes.
This happens when:
- Bile contains too much cholesterol
- The gallbladder does not empty completely
- The liver produces too much bilirubin
When any of these occur, the excess substances crystallize and gradually form stones.
Who Is More Likely to Get Gallstones?
Some factors increase the risk of developing gallstones:
- Being overweight or obese
- Rapid weight loss
- Pregnancy
- Age over 40
- Family history of gallstones
- Diets high in fat and cholesterol
Women are more likely than men to develop gallstones, partly due to hormones.
Do Gallstones Always Cause Symptoms?
No.
Many people have silent gallstones that cause no pain or problems.
Symptoms usually appear only when a stone blocks a bile duct.
What Happens During a Gallbladder Attack?
If a stone blocks the flow of bile, a gallbladder attack can occur.
Common symptoms include:
- Sudden, intense pain in the upper right abdomen
- Pain between the shoulder blades
- Pain in the right shoulder
- Nausea or vomiting
Pain often lasts from a few minutes to several hours.
Key Takeaway
The gallbladder stores bile to help digest fat.
Gallstones form when bile contains too much cholesterol or does not empty properly, and they can cause sudden pain if they block bile flow.
References
- National Institute of Diabetes and Digestive and Kidney Diseases — Gallstones
- Mayo Clinic — Gallstones
- American Gastroenterological Association — Gallstones