For those with severe chilblains or prolonged exposure to cold, the affected tissue may suffer from hypoxia and cell damage, worsening the condition and potentially leading to blisters, erosion, and ulcers. Post-recovery, there may be residual pigmentation, such as red marks. Generally, the body undergoes a self-repair process where these marks gradually fade and disappear. For severe cases, applying ointments that improve microcirculation, repair the skin barrier, and reduce scarring can help accelerate the fading of these red marks.