No known figures exist on prevalence. Lesions reach their peak within 3 years, after which very few new papules occur. Colloid milium is more common in fair-skinned individuals. Adult colloid milium is more common in elderly patients. They are usually asymptomatic, but some can be transiently itchy.
Cosmetic disability can be severe.
Pertinent physical findings are limited to the skin. Amber, waxy, partially translucent papules occur in crops. They normally range from 1-5 mm in diameter. Gelatinous material can be expressed. Plaques also have been described in this form.