Does the Hajj become void if blood comes from a wound in the foot during Tawaf and prayer after performing Wudu and bandaging the wound?

Bleeding from wounds does not invalidate the state of ihram. The Prophet, peace and blessings be upon him, was cupped while in a state of ihram. As for the circumambulation (Tawaf) and prayer, they are valid if removing the impurity is difficult for you, or if the blood is minimal. Otherwise, if the blood is considerable and its removal is possible, you must repeat the Tawaf, because avoiding impurity is a condition for the validity of Tawaf according to the majority of scholars. If you are unable to return to Mecca, then you fall under the ruling of one who is prevented from completing the pilgrimage (muhsar), and you may exit the state of ihram by slaughtering a sacrificial animal or by fasting ten days. As for binding the finger, some scholars hold that no expiatory sacrifice (fidyah) is required for it, and this is the more cautious opinion. It is permissible to bandage wounds while in a state of ihram, as practiced by the early Muslims (Salaf).