Is it correct to say "I feel painful," to mean "I feel pain"?

Please note that I mean only those cases, in which the phrase is a complete sentence. There should be no words after the last word in each quote (like in "I feel painful pulses in my head", "I feel painful burning sensations in my stomach", etc.)

If it's correct, what is the slight difference in meaning there?

Is it correct to say "I feel painful" to mean "I feel pain"?

Please note that I mean only those cases, in which the phrase is a complete sentence. There should be no words after the last word in each quote (like in "I feel painful pulses in my head", "I feel painful burning sensations in my stomach", etc.)

If it's correct, what is the slight difference in meaning there?