Vitiligo occurs when pigment-producing cells called melanocytes are destroyed or stop functioning normally. This can lead to areas of skin becoming significantly lighter or completely depigmented.
Unlike tiny IGH spots, vitiligo often produces larger, more clearly defined patches.
It can affect almost any area of the body, including:
Hands and fingers
Face
Around the eyes and mouth
Elbows and knees
Genital areas
Feet
Armpits
Hair growing within an affected area may also lose pigment.
Vitiligo is not contagious, and it is not caused by poor hygiene.
Because vitiligo can sometimes progress over time, unexplained patches that are becoming larger or appearing in new locations should be assessed by a dermatologist.
4. A Fungal Infection Can Sometimes Look Like White Spots
A condition called tinea versicolor, caused by an overgrowth of a type of yeast that normally lives on the skin, can cause lighter or darker patches.
It most commonly affects the:
- Chest
- Back
- Shoulders
- Upper arms
- Neck
The affected areas may have fine scaling, and some people experience mild itching.
Unlike IGH, tinea versicolor is often found on areas of the trunk rather than only the lower legs and forearms.
It is also more likely to become noticeable in warm, humid conditions.
A healthcare professional can often recognize it based on its appearance, and antifungal treatment may be recommended when appropriate.