Sore or aching muscles
This may feel like you just had a good workout. The soreness should go away after 24-36 hours. Some people find that drinking a little extra water or applying ice may help with the soreness.
Pain
Pain may occur because your muscles are not used to the deep treatment. This should subside. However if it does not, you should contact your massage therapist immediately and ice your back or the point of soreness. After a deeper tissue massage, you may experience a slight headache, which is fairly common and also subsides with time.
Sleepiness
After the massage, it is common to feel tired or fatigued. This may occur due to the fact your muscles are (finally) relaxing and/or your stress has been relieved. This effect shouldn’t last too long after your treatment and it is fine to sleep after a massage. In some cases, people even fall asleep during a massage!