Scalp injections refer to the administration of various substances directly into the scalp to promote hair growth or treat hair loss conditions. These injections can include platelet-rich plasma (PRP), corticosteroids, or other growth factors that aim to stimulate hair follicles and improve scalp health. Their relevance lies in their potential to enhance hair density and slow down hair loss, making them a popular option in hair restoration therapies. Key distinguishing characteristics include the method of delivery, the specific substances used, and the targeted areas of the scalp for treatment.