The first few days of treatment for warts, this necrotic tissue will appear white, patients do not need to worry, it may be necrotic skin tissue, a normal physiological phenomenon. If there are white spots, redness, swelling and pain, in this case pay attention to the possibility of secondary infection, some bacterial infections will appear this situation. If there is no redness, pain, or discomfort, it may be normal necrotic tissue, which will fall off on its own, and there is no need to be nervous.