Final answer:
Withdrawal from heroin can cause physical symptoms such as sweating, nausea, and muscle aches, as well as psychological symptoms like anxiety and cravings for the drug.
Step-by-step explanation:
When someone withdraws from heroin, they may experience a range of physical and psychological symptoms. Physical symptoms can include sweating, nausea, vomiting, diarrhea, muscle aches, and insomnia. Psychological symptoms may include anxiety, depression, irritability, agitation, and cravings for the drug. These symptoms can be severe and intense, and they typically peak within the first few days of withdrawal.