Leaving blackheads alone is generally not harmful, but they can become more pronounced or develop into acne if not properly treated. It’s a good idea to establish a gentle skincare routine that includes cleansing and exfoliation to help manage blackheads. You can try over-the-counter products with ingredients like salicylic acid or benzoyl peroxide to help reduce blackheads. If blackheads persist or worsen, consider consulting a dermatologist for personalized advice and treatment options.

For more information, you can refer to reputable sources like the American Academy of Dermatology’s article on blackheads: [American Academy of Dermatology – Blackheads](https://www.aad.org/public/diseases/acne/enhance-dont-squeeze).