There is a blood vessel "monitoring point" on the instep, and you can know if the blood vessel is blocked There is a blood vessel "monitoring point" on the instep, and you can know if the blood vessel is blocked There is a blood vessel "monitoring point" on the instep, and you can know if the blood vessel is blocked There is a blood vessel "monitoring point" on the instep, and you can know if the blood vessel is blocked There is a blood vessel "monitoring point" on the instep, and you can know if the blood vessel is blocked There is a blood vessel "monitoring point" on the instep, and you can know if the blood vessel is blocked There is a blood vessel "monitoring point" on the instep, and you can know if the blood vessel is blocked There is a blood vessel "monitoring point" on the instep, and you can know if the blood vessel is blocked There is a blood vessel "monitoring point" on the instep, and you can know if the blood vessel is blocked There is a blood vessel "monitoring point" on the instep, and you can know if the blood vessel is blocked There is a blood vessel "monitoring point" on the instep, and you can know if the blood vessel is blocked There is a blood vessel "monitoring point" on the instep, and you can know if the blood vessel is blocked There is a blood vessel "monitoring point" on the instep, and you can know if the blood vessel is blocked