Shoe inserts and insoles can help with pain in a number of ways. First, they can provide support for the arch of the foot, which can take pressure off of the joints and muscles in the foot. Second, they can cushion the foot and absorb shock, which can reduce pain from conditions like plantar fasciitis. Third, they can improve alignment and balance, which can help with knee, hip, and back pain. And finally, they can help to keep the feet warm in cold weather, which can ease joint pain.