Erythema Toxicum Neonatorum: This is a common, benign condition in newborns characterized by small, yellow or white bumps on a red base, often appearing in the first few days of life. It typically resolves on its own without needing treatment.

Intertrigo: A skin infection that occurs in warm, moist areas of the body, such as skin folds. It can cause redness, itching, and sometimes a foul odor. It's common in infants due to their skin folds and can be managed with topical treatments.
Seborrhoeic Dermatitis (Cradle Cap): Although more commonly associated with a scalp rash, seborrhoeic dermatitis can also affect other oily areas of the body, including skin folds, causing redness and a greasy, yellow scale.
Irritant Contact Dermatitis: This can occur due to irritation from urine, feces, or soap, leading to red, shiny skin in the affected areas, including skin folds.

Staphylococcal Scalded Skin Syndrome (SSSS): A serious condition caused by staphylococcal toxins that can lead to widespread skin lesions, looking like burns. It's crucial to diagnose and treat promptly to prevent serious complications.
Congenital Syphilis: Although less common, congenital syphilis can cause a variety of skin manifestations, including rashes and lesions. Given its potential for serious complications, it's essential not to miss this diagnosis.

Langerhans Cell Histiocytosis: A rare disorder in which the body accumulates too many immature Langerhans cells, part of the immune system. It can cause skin lesions, among other symptoms.
Incontinentia Pigmenti: A genetic disorder that affects the skin, hair, teeth, nails, and central nervous system. It can cause blistering and redness in infancy, which may resemble shiny red skin and skin folds.
Epidermolysis Bullosa: A group of genetic conditions that result in fragile skin and blisters. While it presents more commonly with blistering, some forms can cause red, shiny skin, especially in areas subject to friction or trauma.