Why did blood and water come out of Jesus’ body when he was pierced?

The moment when blood and water flowed from the side of Jesus after His death is one of the most striking details recorded in the Gospel of John. John 19:34 NKJV states, “But one of the soldiers pierced His side with a spear, and immediately blood and water came out.” John emphasizes that he personally witnessed this event, writing in verse 35 NKJV, “And he who has seen has testified, and his testimony is true.” This detail is both medically reasonable and spiritually significant. It reveals truths about Jesus’ suffering, the certainty of His death, the fulfillment of prophecy, and the meaning of salvation.

Scripture offers practical wisdom on Why did blood and water come out of Jesus’ body when he was pierced? for believers seeking a deeper walk with God.

Roman Crucifixion and the Breaking of Legs

When Jesus died, the Jewish leaders asked the Roman soldiers to finish the executions quickly so the bodies would not remain on the cross during the Sabbath. John 19:31 NKJV explains, “for that Sabbath was a high day.” The soldiers broke the legs of the two criminals to hasten death. However, when they came to Jesus, they found He was already dead. John 19:33 NKJV says, “But when they came to Jesus and saw that He was already dead, they did not break His legs.”

The Piercing of Jesus’ Side

Instead of breaking His legs, one soldier pierced Jesus’ side to confirm His death. This act fulfilled prophecy, as Zechariah 12:10 NKJV foretold, “They will look on Me whom they pierced.” The piercing was not random; God had already planned that the Messiah would be pierced as part of His suffering and sacrifice. John includes the detail of blood and water to show the reality of Jesus’ death and the deeper meaning behind it.

The Medical Explanation for Blood and Water

Many medical scholars believe Jesus died from a combination of mental and physical exhaustion, blood loss, and heart failure.

Hemohedrosis at Gethsemane

Jesus lost bodily fluids in the Garden of Gethsemane where He went to pray. There, He sweat drops of blood, a condition known as hemohedrosis, where the capillary blood vessels that feed the sweat glands break down. Blood released from the vessels mixes with sweat, resulting in the body sweating drops of blood. Jesus’ great mental anguish caused this condition, as He declared, “my soul is deeply grieved to the point of death” (Matthew 26:38).

The Flogging

Additionally, Jesus lost blood when He was flogged by the Romans (Mark 15:15; John 19:1). They flogged their victims with 39 lashes using an instrument made of leather strips with metal balls and sharp bones. The flogging inflicted deep cuts into the flesh, tearing it and exposing the bones, causing heavy bleeding. The beatings were so severe that some victims did not survive the experience.

After the flogging, victims would lose about one-fifth or more of their normal blood volume due to bleeding, leading to hypovolemic shock. This condition occurs when severe blood or fluid loss makes the heart unable to pump enough blood to the body. Consequently, the heart speeds up to pump more blood, causing the victim to fall or faint due to low blood pressure.

The Crown of Thorns

Moreover, Jesus lost blood when the Roman soldiers placed a crown of thorns on His head (Matthew 27:28-29) and struck His head (Matthew 27:30). The thorns from the crown pierced His skin, causing Him to bleed profusely (Matthew 27:30). At this point, Jesus’ physical condition due to severe blood loss without replacement was critical.

The Hypovolemic Shock

Consequently, Jesus experienced hypovolemic shock while carrying the cross on His way to Golgotha (John 19:17). He was unable to carry the cross, prompting the soldiers to compel a man named Simon of Cyrene to bear His cross to the place called Golgotha (Matthew 27:32-33; Mark 15:21-22; Luke 23:26).

The Nails in His Hands and Feet

At Golgotha, the soldiers “nailed His hands and feet to the cross” (Mark 15:24-26). As a result, Jesus’ hands and feet bled heavily. The weight of His body pulled down on the diaphragm, causing air to move into His lungs and remain there. To exhale, Jesus had to push up on His nailed, bleeding feet, which increased both His agony and the bleeding.

The Pericardial and Pleural Effusion

Simultaneously, the continued rapid heartbeat to circulate the available oxygen before Jesus’ death caused damage to the tissues. Consequently, capillaries leaked watery fluid from the blood into the tissues, resulting in an accumulation of fluid around the heart (pericardial effusion) and the lungs (pleural effusion). These bodily fluids abnormally gathered in the pericardial and pleural cavities.

All this explains why, when a Roman soldier pierced Jesus’ side after He died (John 19:34) with a spear into His lungs and heart to ensure He was dead, “blood and water came out” (John 19:34), referring to the watery fluid around the heart and lungs.

The Symbolic Meaning of Blood and Water

Blood Symbolizes Atonement

The blood of Jesus represents His sacrifice for sin. Leviticus 17:11 NKJV states, “For the life of the flesh is in the blood.” Without the shedding of blood, there is no forgiveness. Hebrews 9:22 NKJV confirms, “Without shedding of blood there is no remission.” The blood flowing from Jesus’ side illustrates that His sacrifice was complete, emphasizing that He gave His life fully to redeem sinners.

Water Symbolizes Cleansing

Water is often a symbol of the Holy Spirit and spiritual cleansing. Jesus told Nicodemus in John 3:5 NKJV, “Unless one is born of water and the Spirit, he cannot enter the kingdom of God.” The water flowing from Jesus’ side symbolizes the cleansing and renewal that He offers. First John 1:7 NKJV states, “The blood of Jesus Christ His Son cleanses us from all sin.” His death not only forgives but also transforms.

Christ as the Source of Life

Jesus described Himself as the giver of living water. In John 7:38 NKJV, He said, “He who believes in Me, as the Scripture has said, out of his heart will flow rivers of living water.” The water from His side reminds us that eternal life flows from Him. His death and resurrection opened the way for believers to receive the Holy Spirit.

Theological Reflections on the Piercing of Jesus

Jesus Gives Everything

The fact that blood and water flowed out shows that Jesus held nothing back. He gave His life completely. Philippians 2:8 NKJV states that He “became obedient to the point of death, even the death of the cross.” His sacrifice was total and voluntary, demonstrating His love for the world.

Access to God Through Jesus

The piercing of Jesus opened a spiritual path for believers. Hebrews 10:19 NKJV states, “Therefore, brethren, having boldness to enter the Holiest by the blood of Jesus.” His sacrifice removed the barrier of sin. Just as the temple veil was torn, the way to God is now open.

Jesus as the Fountain of Cleansing

Zechariah 13:1 NKJV states, “In that day a fountain shall be opened for the house of David and for the inhabitants of Jerusalem, for sin and for uncleanness.” Jesus is that fountain. The blood offers forgiveness, while the water offers cleansing. Together, they picture complete salvation.

Why John Emphasizes His Eyewitness Account

John Wants Believers to Know the Truth

John stresses the accuracy of his account. John 19:35 NKJV states, “His testimony is true; and he knows that he is telling the truth.” John saw the blood and water personally. He includes this detail for a purpose: to prove that Jesus truly died and to show the meaning of His death.

John Points to Faith in Christ

John mentions he wrote these things “so that you may believe.” The death of Christ is not merely a historical event; it invites a response of faith. John 20:31 NKJV states, “These are written that you may believe that Jesus is the Christ.” Belief in His death and resurrection leads to eternal life.

The blood and water that flowed from Jesus’ side are medically understandable but spiritually profound. They confirm His real death, fulfill prophecy, and reveal the richness of salvation. The blood points to forgiveness, while the water points to cleansing. Together, they show that Jesus is the complete source of life, renewal, and hope. His pierced side testifies to a love that gave everything for humanity. Through this act, Scripture is fulfilled, salvation is secured, and the heart of God is revealed to the world.

Greater love has no one than this, than to lay down one’s life for his friends.

John 15:13