Final answer:
When checking for heroin abuse, it is important to consider the risk of infectious diseases, track marks from injecting the drug, and the potential for physical and psychological dependence.
Step-by-step explanation:
When dealing with heroin abuse, it is important to check for several things. One major concern is the risk of contracting infectious diseases such as tuberculosis (TB) and HIV, particularly for those who inject the drug. Heroin users often show 'track marks' on their arms where they have injected the drug. Additionally, another aspect to consider is the potential for physical and psychological dependence on heroin. This can lead to withdrawal symptoms when the drug is not taken, such as nausea, body aches, and anxiety.