Blood in a dream symbolizes the life of a person or animal. The Bible forbids us from drinking and eating blood as it is the life of that creature.
For the life of the flesh is in the blood, and I have given it for you on the altar to make atonement for your souls, for it is the blood that makes atonement by the life.
Dreaming of having blood on your hands.
Dreaming of blood on your hands symbolizes your guilt. You are responsible for bloodshed or you were involved indirectly to cause the death of an innocent person. For example, you might have previously been responsible for an accident due to drunkenness, hence resulting in this kind of dream.
This dream might also be triggered due to an abortion you committed or probably you are a doctor and you are involved in abortion practices meaning that there is bloodshed on your hands. The blood of Innocent children cries out against you. The Bible declares that even now the blood of Abel cries out for vengeance, how much is the blood of thousands of aborted kids?
Related: Seeing a raven in a dream.
Dreaming that you are standing on blood.
Dreaming that you are standing on blood means you are on a battlefield or the ground is defiled due to bloodshed. If you are planning to purchase this land, then the dream serves as a warning not to be involved in that land matter as it is defiled with blood.
Drinking blood in a dream.
Dreaming that you are drinking blood indicates you are involved in a cult or witchcraft. These are the groups that are involved in such practices as they feed on blood and flesh as part of their demonic rituals. Prayer to destroy these evil dreams as well as dedicate yourself to God for sanctification.
Dreaming that you are shedding animal blood indicates the sealing of a covenant. Animal blood is used in making demonic covenants to bind the lives of others. As Christians, we do not shed animal blood as Christ shed his blood as a ransom for our sins.
Dreaming that you are killing someone.
Dreaming that you are killing someone reflects on your wicked heart. You are full of anger and bitterness in your heart, which is reflected as murder in your dreams. John thought that whoever hates his brother is worse than a murderer.
1 John 3:15
Everyone who hates his brother is a murderer, and you know that no murderer has eternal life abiding in him.
Being washed with blood in a dream.
Dreaming that you are being washed with blood that sanctifies you symbolizes a cleansing process. You are being cleansed with the blood of the lamb Jesus Christ. This is the manifestation of pleading the blood of Jesus in your dream.
You should also be cautious and try to understand the source of your dream not to miss the mark.
Related: Two things God hates the most.
Dreaming that you are bleeding.
Bleeding in a dream is a form of demonic attack. You may dream of having menstruation or nose bleeding, while in real life you are not. There are demonic entities responsible for your state. Most often after having such a dream you wake up weak or sick.
I know of a unique case where a certain boy was hospitalized for excess blood loss. However, after the doctors run several tests, they found no disease in the kids’ system. They could not explain why he was losing his blood; this is because the matter was spiritual and not a physical one. The kid’s blood was being drained at night for witchcraft rituals which eventually led to his death weeks later.