While both cystic acne and blackheads Types of acne, they can look very different. What makes things more complicated is, according to Very good health, acne is not a one-size-fits-all defect. In fact, there are so many different types of acne that make things even more confusing.
Acne with red bumps on the skin is called papules (through GoodRx). As the spot develops, it may have a white or yellow tip and be filled with pus. If it develops into a head, it’s called a pustule, but it’s worth noting that not all papules turn into pustules – every pimple is different.
A blackhead, on the other hand, has a black or brown head and looks like a dark spot on the skin – not on the skin like a freckle but actually under the skin. Blackheads can vary in size, while some are very small and hard to see, others are much larger and more obvious.
https://www.thelist.com/704536/heres-the-real-difference-between-blackheads-and-acne/ This is the real difference between blackheads and acne