Opioids are used to reduce pain and for painful surgery. But excessive use of opioids causes many serious problems. There are some symptoms of opioid addiction, such as physical symptoms, which you can easily see, like sweating, craving, an increase in body temperature, etc. and other symptoms such as anxiety, depression, constipation, bone pain, and sleeping disorders. For more info... https://secondnewlife.com/opioid-addiction/