Neonatal Acne: This condition is common in newborns and can appear as acne-like lesions on the face, but it can also occur on the back of the head. It's thought to be caused by exposure to maternal hormones in the womb and typically resolves on its own.

Eczema (Atopic Dermatitis): Infants can develop eczema, which may appear as red, itchy patches on the skin, including the back of the head. It's a common condition in infants and can be managed with topical treatments.
Cradle Cap (Seborrhoeic Dermatitis): This is a common condition in infants characterized by a red, oily, scaly rash on the scalp, which can sometimes be mistaken for acne. It's usually harmless and can be treated with shampoo and topical steroids.
Folliculitis: An infection of the hair follicles, which can cause red, inflamed bumps that resemble acne. It can be caused by bacterial or fungal infections.

Congenital Syphilis: Although rare, congenital syphilis can cause a variety of skin rashes, including ones that might resemble acne. It's crucial to diagnose and treat syphilis promptly to prevent serious complications.
Infantile Hemangiomas: While not typically mistaken for acne, these benign tumors can appear as red, raised lesions. They usually resolve on their own but can cause complications if they obstruct vision, breathing, or other vital functions.

Keratosis Pilaris: A condition characterized by small, rough, sandpapery bumps on the skin, which can occasionally be mistaken for acne. It's more common on the arms and legs but can appear on the scalp.
Langerhans Cell Histiocytosis: A rare disorder in which the body accumulates too many immune cells called Langerhans cells, leading to a variety of symptoms, including skin lesions that might resemble acne. It's a serious condition requiring prompt medical attention.