What causes hair to turn yellow in spots?

Sun damage: Prolonged exposure to ultraviolet (UV) radiation from the sun can damage the hair shaft and cause it to turn yellow. This is especially common in people with light-colored hair.

Chlorine: Chlorine is a chemical found in swimming pools and other bodies of water. It can react with the proteins in hair, causing it to turn yellow or green.

Hard water: Hard water contains minerals such as calcium and magnesium, which can build up on the hair shaft and make it appear yellow.

Certain medications: Some medications, such as antibiotics and antidepressants, can cause hair to turn yellow as a side effect.

Medical conditions: Certain medical conditions, such as liver disease and kidney disease, can cause hair to turn yellow.

Diet: A diet that is deficient in certain nutrients, such as protein, iron, and zinc, can also lead to yellow hair.

If you are concerned about the color of your hair, you should talk to your doctor or a dermatologist to determine the cause and discuss possible treatment options.