Peace be upon you. If the wound is very small and it is possible to wash the area, you should do so. The rules of a bandage do not apply in this case. If water is poured over the area and it stops for a moment before continuing, that is sufficient for ablution or washing, and you do not need to resort to dry ablution (tayammum). However, if the wound requires the rules of a bandage, it is permissible for the person with the bandage to pray at the beginning of the time, and they do not need to repeat the prayer even if the excuse is removed later. According to Ayatollah Khamenei, if the wound is very small, you should either wait for it to stop bleeding or wash the area under the faucet, applying pressure to stop the bleeding momentarily. After the water has passed over it, the presence of blood, even if significant, does not harm your ablution. According to Ayatollah Sistani, if the wound is small, the rules of a bandage do not apply, and you should wait for it to stop or wash it as described. May you be successful in all good deeds.