I have pimple problem. I'm 25 year old female and still I have acne on my face. I have developed pus pimple on my chin its abt 10 to 15 of them smal?

Manage it. Topical benzoyl peroxide, maybe 5%, 1-2x/day. If you're not clear in two weeks, get with your physician who can add prescription-strength Rx. Ignore all "pop" wisdom about "what you did to cause your acne". It is non-lifestyle-related and you need to manage it until it self-cures, which it will eventually do. It's unpredictable. Best wishes.