Blood blisters on plantar warts should not usually be lanced on their own to avoid infection.
Plantar warts are common warts that occur on the bottom of the foot and are benign growths. They are caused by the human papilloma virus infecting the skin on the bottom of the foot, and the virus can be contracted through direct or indirect skin contact. Skin trauma, pressure, friction, excessive sweating, and maceration can be triggers.
Because blood blisters of plantar warts are a contagious disease, they usually cannot be punctured on their own to avoid infecting other parts of the body. You can go to the hospital, the professional doctor in aseptic operation, first with disinfectant water for local disinfection, and then with a sterile needle to puncture or suction blisters, after which you can use saline rinse, and then disinfect the affected area with disinfectant water.
If you have a plantar wart with a blood blister, you should go to a regular hospital in time to clarify the cause of the disease and take targeted treatment under the guidance of a professional doctor.