Wanted to know if blackheads cause other acne to form as well?

Yes: Blackheads are the retained oil-rich masses that are markers for proneness to acne, and the bacteria gain the ability to cause disease by adhering to their surfaces. If you have a lot of blackheads / comedones and have acne, your first step to clearing up may be using a topical retinoic acid derivative as tolerated. Your physician can add another Rx if this coes not clear you.