I need some advice regarding my skin problem. From...

Forehead pimples treatment :
1. consult a dermatoglist doctor to do the needed medical examnation and determine the treatment pathway
2. have a healthy life style , including : healthy diet , exercise , sleep and rest well
3. avoid stress 
4. using topical benzoyl peroxide and salicylic acid is useful in some cases to get rid of pimples 
4. usually doctor starts treatment therapy by topical antibiotics such as erythromycin or clindamycin 
5. if topical treatment isnt effective , doctor may prescribe oral medication such as doxycycilin and isoterinoin
6. you can use laser therpy later after to renew your skin layer and get rid of unwanted hair 
Acne and pimples causes :
1. infection
2. stress 
3. some types of food and medications 
4. smoking is a risk factor 
5. oily and hairy skin 
Food to avoid while treating pimples :
1. chocolete 
2. bread and heavy carbohydrate food such as chips 
3. oily food 
4. condiments and spices