scaly, raised, or changing rapidly, see a dermatologist. That could be something else.
What About Other Causes of White Spots?
While IGH is the most common cause on the arms and legs, other conditions can cause similar-looking spots. Here’s how to tell them apart.
Tinea Versicolor: A fungal infection that causes scaly patches, often on the chest and back. Unlike IGH, these spots often have a fine scale and may itch slightly. They are more common in warm, humid climates.
Pityriasis Alba: Often seen in children, these are dry, scaly patches that are common on the face and arms. They are related to eczema or dry skin and tend to fade over time.
Vitiligo: An autoimmune condition that causes larger, smooth, white patches that can grow and merge over time. The patches are often symmetrical and can appear anywhere on the body.
Post-inflammatory hypopigmentation: White spots that appear after a
