Pulling out blackheads manually can potentially be harmful to your skin. When you squeeze or pull at blackheads, it can cause irritation, redness, and even scarring. Additionally, it can push the bacteria and oils further into the skin, leading to more breakouts. It is advisable to use proper skincare products, like those with ingredients such as salicylic acid or benzoyl peroxide, or seek professional help, such as from a dermatologist or aesthetician, to safely and effectively address blackheads.