As beautifully explained by Dr Pallavi mild soaps should be preffered or just avoid soap as much as you can and go for simple water rinse.
Also avoid junk food, excessive salt, big no to sauses or chattni, best to follow 7 days salt less diet which will include fruits, kheer, dalia , boiled rice , milk,
Anything without spices, tadka , oil , salt..
This will help a lot to detoxify your system.
More than 3 ltr water per day is must.
Himalya clarina oint can be used for more speedy results.
Next Steps
If you are having hair dandruff then resolve it first because hairdandruff also aggrivates acne fingers carry allergents from head to face.
Health Tips
don't go out side without sunblock and clean face with speelac face wash everytime you return home from outside or just clean your face with astringent