Back Muscle Strain?

Today morning while doing my regular excercise, I strained the muscle near my left scapula. Before the excercise, I do stretching excerise. At that time itself I noticed some strain. I didn't give much importance to it and I continued with my excercise. RESULT - I strained my muscle. I stopped the excercise and kept the related muscle at rest. I feel painless when the muscle is at rest. But severe pain is generated when I move my body. It is early in the morning here (4 am). I cannot hunt for a doctor now.

Moreover, I want to know how to get cured from this injury in few minutes. There must be a way. Let me know if you know the way.

I am not expecting usual methods: cold pack, hot pack and muscle rest.

I also want to know why muscle strain occurs.

It is not as simple as snapping your fingers and the pain is gone, that would be great if it worked, I'd use it on alot of things. But really, you have the right idea of hot and cold, cold first then heat. Do not over work that area and lighten up on your exercise routine. I have done several of these things to help my back or neck when in serious pain, but nothing but time will completely heal you. I hope you feel better soon.

Forget the "no pain, no gain" bit. When you feel pain, it's your body telling you something, it's telling you that your overworking it, hurting it etc. So you should never have tried to work through after noticing the strain. Once you injure a muscle there is not quick cure, it's going to have to heal on and in it's own time.
Muscle strain occurs because your making it do more than it is able to do and/or pushing it too fast etc.