How to Heal a Fracture in Project Zomboid (Build 42.19)

Build 42.19 · limbs only for splints · First Aid sets the speed-up · Comfrey is an extra boost

Splint

Ripped Sheets

Plank

Tree Branch

Wooden Stick

Comfrey ×5

Comfrey Poultice

Mortar and Pestle

What a fracture does

Falls, vehicle impacts, and hard zombie hits can set a body part’s Fracture timer. While it is active the limb is injured: expect pain, restricted use of that limb (including combat and carrying), and a long natural recovery if you do nothing.

Fractures heal on their own. Treatment does not “set the bone” with a one-click cure—it raises the healing rate so the Fracture value drains much faster. In sandbox options, Bone Fracture can disable fracture injuries entirely, and Injury Severity (Low / Normal / High) changes how hard hits land and how long injuries last.

Step 1 — Apply a splint (main treatment)

Materials must be in your inventory (or the treating player’s inventory if helping someone else). Two valid options:

• Ready Splint item — loot one, or craft it first (see below).
• On the fly: 1× Ripped Sheets + 1× Plank, Tree Branch, or Wooden Stick.

1. Open Health.
2. Right-click the fractured limb (the red Fracture text / body part).
3. Choose Splint, then pick either the ready Splint or a wood + Ripped Sheets combination.
4. Wait for the timed action. The panel should switch to a green Splinted status.

Crafting a Splint ahead of time

The Medical craft recipe Make Splint (in-hand, no skill book required) builds a portable Splint from:

• 1× fabric strip: Ripped Sheets, Dirty Ripped Sheets, Denim Strips, Dirty Denim Strips, Leather Strips, or Dirty Leather Strips
• 1× rigid piece: Plank, Tree Branch, or Wooden Stick

Applying from the Health menu with loose materials still expects clean Ripped Sheets plus wood. Pre-crafting a Splint is useful when you only have denim or leather strips, or when you want a finished kit in a bag. Tear clothing for Ripped Sheets using the usual rip action—see the sheets guide.

How much faster does a splint heal?

Healing speed is not a flat 10×. When you apply a splint, the speed-up scales with the treating character’s First Aid skill:

Splint factor ≈ (First Aid level + 1) ÷ 2

Compared with an unsplinted fracture, a splinted limb heals faster by a higher base rate, then multiplies by that factor. Practical relative speeds:

So the familiar “about 10×” figure only matches roughly First Aid 1. Higher First Aid keeps paying off on every new splint you apply. The apply action also finishes a little faster at higher First Aid.

With First Aid above 4–6, the Health panel can show quality hints (for example Moderate/Severe fracture or Good/Moderate splint). Those labels help you judge the injury; they are not separate treatments.

First Aid XP — when you actually get it

Step 2 — Comfrey Poultice (extra boost)

Comfrey Poultice does not replace a splint. It adds a temporary healing boost on the body part while the poultice effect lasts. Use it after (or alongside) proper immobilization on limbs.

Recipe (Build 42.19)

• Mortar and Pestle (kept / not consumed)
• 5× Comfrey
• Output: 1× Comfrey Poultice
• Crafted as a Medical / Health surface recipe

You must know the recipe before it appears in the craft menu. Ways to unlock Make Comfrey Poultice:

• Read The Herbalist magazine
• Take the Herbalist trait (or profession paths that grant it)
• Wilderness Knowledge trait packages that include the poultice recipes
• Auto-learn at First Aid 5 or Foraging 5

Apply from the Health panel when you carry the poultice: right-click the injured part → Comfrey Poultice. Strength scales with the applier’s First Aid (higher skill → stronger average boost). Characters with Hemophobic can take panic if they treat a still-bleeding part.

Comfrey itself is commonly gathered by foraging; growing season knowledge can come from seed packets, magazines, or traits that unlock medicinal plant seasons.

What actually changes healing time

Because starting severity and multipliers vary, the old “usually several weeks” line is only a loose feel for an untreated or poorly treated break. With a high First Aid splint (and Comfrey), recovery can be dramatically shorter; with Slow Healer, high Injury Severity, and no splint, it can be much longer. Watch the Health panel until Fracture / Splinted clears rather than counting calendar weeks.

Practical tips

• Splint early on usable limbs. Even First Aid 0 is still about 5× faster than leaving the bone free.
• Let a skilled friend apply the splint in multiplayer if their First Aid is higher—the factor uses the treating player’s skill.
• Stock Ripped Sheets and sticks before roof runs or long car trips; Make Splint is cheap insurance.
• Do not expect head/torso braces. Survive with rest, pain management, and other first-aid as needed until timers expire.
• Keep treating other injuries on the same part (bleeding, infection, deep wounds). A splint does not replace bandages or stitches—see the first aid overview.