From the Research
Sutures from a 5 mm punch biopsy on the upper back should typically be removed after 10-14 days. This longer timeframe is necessary because the upper back is a high-tension area with significant movement during daily activities, which can place stress on the healing wound. Early suture removal might lead to wound dehiscence (reopening), while leaving sutures in too long increases the risk of suture marks or "railroad tracking" scars. According to a study published in 2005 1, primary closure vs second-intention treatment of skin punch biopsy sites showed equivalent healing outcomes, but the study did not specifically address suture removal timing. However, considering the anatomy and physiology of wound healing, it is essential to prioritize wound strength development and minimize complications. During the healing period, keep the wound clean and dry, applying antibiotic ointment as directed by your healthcare provider. Avoid strenuous activities that stretch the upper back for at least 1-2 weeks to minimize tension on the wound. The extended removal timeframe allows for adequate collagen deposition and wound strength development, which is particularly important in this anatomical location where skin is thicker and healing can be slower compared to other body areas. A more recent study from 2022 2 discusses skin biopsy techniques, but does not provide specific guidance on suture removal timing, making the 2005 study 1 and general wound healing principles the most relevant guides for clinical decision-making.