The black blood blisters after the plantar warts freezing and constantly getting bigger need to be judged according to the size of the blood blisters, if it is a small blood blisters do not need to be treated, if the blood blisters are larger, you need to poke the blood blisters. If you have a small blood bubble, you can leave it alone, because it will be absorbed by itself. If the metatarsal warts after freezing black blood bubble continues to get bigger and bigger affect normal walking, you need to use iodine vapour or alcohol disinfection, and then use a sterile syringe to puncture the black blood bubble and draw off the liquid inside, and then use a sterile gauze for bandaging. The black blood blisters that appear locally after the metatarsal warts are frozen need to consult a doctor in time, and the doctor will choose the appropriate measures for treatment according to the severity of the blood blisters. It is recommended to wear cotton shoes and socks that are breathable and loose, and not to squeeze the affected area. If the localized black blood blisters are punctured, avoid touching the affected area with water to avoid infection.