Final answer:
The main concern with using silver sulfadiazine on a cheek burn is the potential for facial stain or hyperpigmentation, which could affect the patient's appearance.
Step-by-step explanation:
A concern when using silver sulfadiazine on a burn on the cheek is d. Facial stain. Silver sulfadiazine is a topical cream used in the treatment of burns and has antimicrobial properties, which helps in preventing infection. However, one of its potential side effects is discoloration of the skin or hyperpigmentation, especially on areas like the face where cosmetic appearance is a considerable concern.
While silver has a long history of antiseptic use, such as in silver-containing dressings and catheters, its use in silver sulfadiazine cream can lead to unwanted cosmetic changes. Therefore, while it is helpful in preventing infection, its use on the face should be carefully considered against the risk of facial stain, which can have a significant impact on a patient's appearance.