Because your osteopath is diagnosing and correcting mechanical imbalance and restriction, after a treatment you will usually feel more energetic, balanced and mobile. If yours is a chronic or acutely inflamed problem, the massage and mobilisation may well cause some post treatment soreness, which usually passes in a couple of days. You may find that after treatment you feel inexplicably lighter, and are able to sleep well and wake refreshed for the first time in a long while. This is indicative of reduced mechanical strain in your structure. Quality of sleep is a great indicator of both your need for osteopathic therapy and your response to it.