Another possible cause is vitiligo, a condition in which pigment-producing cells stop working in certain areas. This can create larger, sharply defined white patches that may gradually spread over time.
Fungal infections such as tinea versicolor can also cause lighter patches, particularly on the chest, back, shoulders, or neck. These areas may be slightly scaly or itchy and often become more noticeable after sun exposure.
White spots do not automatically mean something serious, but persistent, spreading, itchy, or rapidly changing patches should be examined by a healthcare professional. A dermatologist can determine the exact cause and recommend appropriate treatment.
