It is a self-limiting disorder of healthy newborns.

Cause

• Hypoxia during delivery
• Post-trauma
• Hypothermia
• Calcium derangement

Features

• Well circumscribed and indurated lesions
• The surface may look uneven and lobulated
• Lesions are usually asymptomatic or mildly painful
• Most common locations – back, buttock, cheeks

Duration

• May last a few weeks to months

Investigations

• Blood may show high calcium levels in up to 10% of babies
• If a skin biopsy is done, it shows fat crystals in the subcutaneous tissue

Treatment

• There is no treatment. They disappear in a few months.