A very good link for a thought provoking content. All along I was under the impression all pains are same. But the article thrown light on two heads. A good pain and a bad pain.

Nice article sir. From it we can know about any serious injuries by knowing the pain.

Article vividly explains about the two kinds of pains. That is Good pain and Bad pain.

Yes.. From it we can easily identify the serious problem from the pain. 

Informative article. Good pain means the safer one that we need not be more worried about; and the bad refers to the serious case. They vary in degree. Still, pain is painful. 

The link article provided the solution for different pains.

Good info, as this article enlightened and differentiate about good and bad ache, a good knowledge base but still it would not be universal as there could be some safe ache might be landing you in trouble, so keep reading but using yours own mental reasoning to known abotu extent of pain. 

That is understood and readers should know that the contents in the article are a rough Guidance. User's discretion should be exercised.

There is no final in research, it is own ideas and experience that helps to take decision nicely.