Erythema Infectiosum (Fifth Disease): A common childhood illness caused by parvovirus B19, characterized by a distinctive "slapped-cheek" appearance, making it a leading consideration for a cheeks rash.

Rosacea: An inflammatory skin condition that can cause redness, acne-like symptoms, and flushing on the cheeks, among other areas of the face.
Contact Dermatitis: An allergic or irritant reaction to substances like cosmetics, soaps, or metals, which can lead to a rash on the cheeks.
Acne: Although more commonly associated with the forehead and chin, acne can also occur on the cheeks, especially in individuals with oily skin or during puberty.
Eczema (Atopic Dermatitis): A chronic condition that can cause dry, itchy, and inflamed skin, including on the cheeks, particularly in children and individuals with allergies.

Lupus Erythematosus: A systemic autoimmune disease that can cause a characteristic butterfly-shaped rash across the cheeks and nose, which is crucial to identify due to its potential for serious complications.
Sarcoidosis: An autoimmune disease that can lead to skin lesions, including on the cheeks, and requires early diagnosis to manage its systemic effects.
Cellulitis: A bacterial skin infection that can cause redness, swelling, and warmth, potentially on the cheeks, which needs prompt antibiotic treatment to prevent serious outcomes.

Sjögren's Syndrome: An autoimmune disorder that can cause skin rashes, among other symptoms like dry eyes and mouth, though it's less commonly associated with isolated cheek rashes.
Dermatomyositis: An inflammatory disease characterized by skin rash and muscle weakness, with the rash sometimes appearing on the cheeks, though it's a rare condition.
Granuloma Faciale: A rare skin condition causing reddish-brown plaques or patches, typically on the face, including the cheeks, which can be challenging to treat.