For at least 2 hours post-treatment, do NOT use any Alpha Hydroxy Acids, Beta Hydroxy Acid, Retinol (Vitamin A), Vitamin C (in a low pH formula), or anything perceived as 'active' skincare.
Avoid intentional and direct sunlight for 24 hours - no tanning beds. Do not go swimming for at least 24 hours post-treatment. Avoid exercising or strenuous activity for the first 25 hours post-treatment. Sweating and gym environments are harmful, rife with bacteria, and may cause microneedling treatment so you can allow your skin to breathe and recover.
Also, do not use a makeup brush at this time - especially a dirty one! After 72 hours, apply makeup only with clean brushes.