How do I turn on the realistic health system?

Type /doom in the chat window to activate the custom body mechanics. You can toggle it back off anytime with /doom off, and standard players on your server won't be affected.

Do I have to use this mod if someone else activates it on our server?

No, the mod is opt-in. Only players who type /doom will use the realistic body system; others continue playing with standard Minecraft health rules on the same server.

Vitals Under Siege Wiki & Guide

DownloadVitals Under Siege

Get the files on 9Minecraft

Contents (8)

Guides
Processes
Items
Blocks
Mobs
Configuration
Frequently asked questions

Guides

Step-by-step, in-game.

Manage Blood Type and Perform a Safe TransfusionCheck Your Blood Type Press H to open your body status panel. Your assigned blood type is displayed in your vital…Perform Surgery on an Injured TeammatePrepare Your Surgical Tools Gather surgical instruments and medical supplies—scalpels, sutures, bone saws, and…Stop Severe Bleeding Before You Bleed OutIdentify Active Hemorrhage Press H to open your body status panel. Look for red indicators on specific body…Treat a Bone Fracture and Regain MobilityDiagnose the Fracture Press H and inspect your body status panel for indicators of broken or fractured bones.…

Recipes

Every recipe the mod adds, grouped by how it is made.

Crafting · 100 doomedmatu:chemical_grade_shapeless · 2 doomedmatu:taint_smelting · 2 doomedmatu:taint_campfire · 2 doomedmatu:taint_smoking · 2 doomedmatu:procoagulant_syringe · 1 minecraft:smelting · 1

Items

268 items · showing 24. Browse all →

View all 268 items →

Blocks

80 blocks · showing 24. Browse all →

View all 80 blocks →

Mobs

Creatures this mod adds.

BloodBulletCrawlerCyst CarrierCyst Dispersal LarvaDeep MawDynamiteRagdollSevered LimbSevered TentacleSpiderTraderVomitVomit

Configuration

Every setting in the mod config file, with what it changes.

Option	What it does
`fluid_barrel`	Batch Blending Barrel (contents / purity)
`machine`	Chemistry Machine (heat / glassware)

Frequently asked questions

What does the H key do?

Press H to open your body status panel, which displays all your vital signs including blood pressure, heart rhythm, core temperature, oxygen levels, and any active injuries or organ damage.

Can I die from blood loss even with food in my inventory?

Yes—eating food no longer restores health in this mod. Instead, you must actively treat wounds by crafting medical supplies, stopping bleeding, and stabilizing your vitals before you bleed out.

What happens if I break a bone?

Bone fractures and joint dislocations limit your movement speed and prevent you from eating until treated. Follow the bone fracture treatment guide to set the break and regain mobility.

Do I need the same blood type to give someone a transfusion?

No, but blood type compatibility matters—incompatible transfusions can cause serious harm. Each player is assigned one of eight real blood types; check the transfusion guide to match types safely.

Can my teammate perform surgery on me if I'm panicking?

Yes—when you're injured and in pain, your hands shake, making precise actions harder. A nearby teammate with steadier hands can perform surgery and medical steps for you during combat or emergencies.

What's the difference between a cut, a wound, and a hemorrhage?

Each injury is tracked individually based on depth, bleeding rate, dirt contamination, and age. A small cut might stop bleeding on its own, while a deep wound or active hemorrhage requires immediate bandaging or surgery to prevent death.

How many medical items does this mod add?

The mod adds over 280 medical items and tools to treat injuries, stop bleeding, clean wounds, set bones, and stabilize failing organs.

Can I use this mod in multiplayer, or does it only work in singleplayer?

It works in both singleplayer and multiplayer worlds. On a server, each player can opt in independently, and teammates can assist with surgery and medical treatment.