The appearance of small brown patches after using a 0.75 mm dermaroller could be a form of post-inflammatory hyperpigmentation (PIH), which is common in individuals with medium to darker skin tones, such as wheatish complexions. Here are some considerations and potential steps you can take: Natural Fading: PIH can fade over time, but the duration varies from person to person. It may take several weeks to months for the pigmentation to diminish naturally. Sun Protection: Protecting your skin from sun exposure is crucial. Use a broad-spectrum sunscreen with at least SPF 30 daily, as sun exposure can worsen pigmentation. Skincare Products: Consider using skincare products containing ingredients known to help fade pigmentation, such as vitamin C, niacinamide, or azelaic acid. These can help brighten the skin and even out skin tone over time. Avoid Further Irritation: Be gentle with your skin and avoid any further irritation that can exacerbate pigmentation, such as harsh exfoliants or aggressive treatments. Consult a Dermatologist: If the pigmentation persists or if you're concerned, consult a dermatologist. They can provide personalized advice and, if necessary, recommend treatments such as topical lightening agents, chemical peels, or laser therapy tailored to your skin type. Monitoring your skin's response and making adjustments as needed with the guidance of a healthcare professional can help manage and improve the appearance of pigmentation.