This is accompanied by a warming numbing body high that starts in the head and spreads throughout the body, leaving you completely relaxed and sedated. Upon the come down, you'll be eased into a deep and powerful pain-free sleep that lasts hours on end. Due to these potent effects, Purple Kush is said to be an ideal strain for treating patients suffering from conditions such as insomnia, chronic pain, nerve damage, and muscle spasms.