Advice On Steroid Creams For Phimosis

Patient: Good morning sir….i am Prakhar, 19 years old…..i have phimosis…i can retract my foreskin when penis is flaccid, but when it erects to the full, i was not able to retract my foreskin, it pains a little when i try when its in erect position…how can i be able to cure this???should i use any steroid cream??? if yes, can u please name any one steroid cream???THANK YOU SIR