What are notable clinical signs of subcutaneous heroin injection?

The notable clinical signs of subcutaneous heroin injection primarily include fat necrosis and skin abscesses. When heroin is injected under the skin, it can lead to local tissue damage and inflammation. Fat necrosis occurs as the fat tissue becomes necrotic due to the trauma and toxicity introduced by the drug, while skin abscesses develop as a result of infection that can occur at the injection site. These complications are common with subcutaneous injection due to the nature of the drug and the method of administration, making these signs particularly relevant for individuals using heroin in this manner.

The other options may reflect general or unrelated symptoms but do not specifically correlate with the distinct risks and signs associated with subcutaneous heroin injection. This highlights the importance of understanding the specific health risks tied to different drug use practices in a behavioral health context.