A back scratcher is a tool that can be used to scratch the back, especially in places that are difficult to reach with your hands. While it may not be considered an essential aid to living item, it can certainly be a helpful tool for individuals with limited mobility or flexibility who may have difficulty reaching certain areas of their back. It can also be useful for individuals who have a temporary injury or condition that makes it difficult to reach their back, such as a shoulder injury.
Using a back scratcher can help to relieve itchiness, discomfort, and tension in the back muscles. It can also help to prevent skin irritation or damage that can occur from scratching with the fingernails. While it may not be a necessary aid to living items, it can certainly be a useful and convenient tool for those who find it difficult to scratch their back with their hands.