This website provide this following info:

Some action verbs reduce to the present participle (ing form) especially when the present tense is used.

1. Remove the relative pronoun 2. Change the verb to the present participle form 3. Place the present participle phrase after the modified noun

Examples:

• The man who lives near my home walks to work every day. → Reduced: The man living near my home walks to work every day.

• The girl who attends my school lives at the end of the street. → Reduced: The girl attending my school lives at the end of the street.

So, my question is "how the above formula being applied to non-action verbs like feel & think?"

Ex, Can "The girl who feels no pain is my sister" be reduced to "The girl feeling no pain is my sister"?