As you mentioned, these 'whiteheads' are present all over your face, you are advised to get them diagnosed first, what sort of 'whiteheads' are they. Right diagnosis is important for a correct treatment
Get your skin assessed first by a certified dermatologist, and feel free to ask customised skin products according to your skin type and issues
Next Steps
consult a certified dermatologist
Health Tips
use a cream based moisturiser if skin is dry