Hello,
For premature ejaculation, try distracting yourself when you feel you are about to ejaculate. Take a deep breath and stay relaxed during intercourse. Also do not worry about performance and talk to your partner openly about any apprehensions if you have. Other treatment methods which can be followed are stop-start or squeeze-pause technique.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
Your question is not very clear. If it for premature ejaculation you may Google the words, EDGING, Kegel exercise,Male Deer Exercise, abdominal breathing, Microcosmic orbit, Sat kriya etc. You will find answers While you Google these words.
You can also see the above videos. You may get some idea of your problem.