Using products like Dermatend can sometimes result in unexpected skin reactions, such as dark spots or pigmentation changes. Here are some insights and suggestions to consider: Post-Use Pigmentation: It's possible that the product caused irritation or an inflammatory response, leading to post-inflammatory hyperpigmentation (PIH), which can appear as dark spots on the skin. Avoid Further Irritation: Discontinue use of Dermatend or any similar products, and avoid using harsh or abrasive skincare items on the affected area. Sun Protection: Protect the area from sun exposure by applying a broad-spectrum sunscreen with at least SPF 30, as UV exposure can worsen pigmentation. Gentle Skincare: Use a gentle, hydrating moisturizer and a mild cleanser to support skin recovery without further irritation. Consult a Dermatologist: Since your doctor was unsure of the cause, consider consulting a dermatologist for a more specialized evaluation. They may recommend treatments such as topical lightening agents, chemical peels, or laser therapy, depending on the severity of the pigmentation. Monitor Changes: Keep an eye on the spot for any changes in size, shape, or color, and report these to your healthcare provider. It's important to address these concerns with a skin specialist to determine the best course of action for your specific situation.