hiii dear it may be side effect of certain medicines physical health also cause erectile problem other factors are 1st is life syle stress and busy life style make u fatigue and secondry to this it makes less desire in sex and erectile problems 2nd is relationship free communicative and mutual understanding will help sex is mutual act so try to do mutually and tell your problem to partner this will reduce your anxiety and able to erect easily so stress free lifestyle and mutual communication will help third is physical health routine check up and fit physical health is necessary psychological soundness is must and sun set focus method for erection is very useful . plz read google ab this take care get well soon