diff --git a/doc/JSON_INFO.md b/doc/JSON_INFO.md
index 2ccd779fd0875..b6b4395ddfd60 100644
--- a/doc/JSON_INFO.md
+++ b/doc/JSON_INFO.md
@@ -3019,7 +3019,7 @@ See [MUTATIONS.md](MUTATIONS.md)
     "always_invisible": true, // Super well hidden traps the player can never detect
     "funnel_radius": 200, // millimeters. The higher the more rain it will capture.
     "comfort": 0, // Same property affecting furniture and terrain
-    "floor_bedding_warmth": -500, // Same property affecting furniture and terrain
+    "floor_bedding_warmth": -500, // Same property affecting furniture and terrain. Also affects how comfortable a resting place this is(affects healing). Vanilla values should not exceed 1000.
     "spell_data": { "id": "bear_trap" }, // data required for trapfunc::spell()
     "trigger_weight": "200 g", // If an item with this weight or more is thrown onto the trap, it triggers. Defaults to 500 grams.
     "drops": [ "beartrap" ], // ID of item spawned when disassembled
@@ -3249,7 +3249,7 @@ These values apply to crafting tasks performed at the WORKBENCH.
 #### The following optional fields are specific to SEATs.
 ```c++
 "comfort": 3,                 // (Optional, default=0). Sleeping comfort as for terrain/furniture.
-"floor_bedding_warmth": 300,  // (Optional, default=0). Bonus warmth as for terrain/furniture.
+"floor_bedding_warmth": 300,  // (Optional, default=0). Bonus warmth as for terrain/furniture. Also affects how comfortable a resting place this is(affects healing). Vanilla values should not exceed 1000.
 "bonus_fire_warmth_feet": 200,// (Optional, default=0). Bonus fire warmth as for terrain/furniture.
 ```
 
@@ -5482,7 +5482,7 @@ How comfortable this terrain/furniture is. Impact ability to fall asleep on it.
 
 #### `floor_bedding_warmth`
 
-Bonus warmth offered by this terrain/furniture when used to sleep.
+Bonus warmth offered by this terrain/furniture when used to sleep. Also affects how comfortable a resting place this is(affects healing). Vanilla values should not exceed 1000.
 
 #### `bonus_fire_warmth_feet`
 
diff --git a/src/character.cpp b/src/character.cpp
index 7338e3518f5ab..df024ed54e575 100644
--- a/src/character.cpp
+++ b/src/character.cpp
@@ -6165,6 +6165,7 @@ float Character::rest_quality() const
     map &here = get_map();
     const tripoint your_pos = pos();
     float rest = 0.0f;
+    const float ur_act_level = instantaneous_activity_level();
     // Negative morales are penalties
     int cold_penalty = -has_morale( morale_cold );
     int heat_penalty = -has_morale( morale_hot );
@@ -6182,7 +6183,7 @@ float Character::rest_quality() const
     }
     const optional_vpart_position veh_part = here.veh_at( your_pos );
     bool has_vehicle_seat = !!veh_part.part_with_feature( "SEAT", true );
-    if( activity_level() <= LIGHT_EXERCISE ) {
+    if( ur_act_level <= LIGHT_EXERCISE ) {
         rest += 0.1f;
         if( here.has_flag_ter_or_furn( "CAN_SIT", your_pos.xy() ) || has_vehicle_seat ) {
             // If not performing any real exercise (not even moving around), chairs allow you to rest a little bit.
@@ -6191,20 +6192,21 @@ float Character::rest_quality() const
             // Any comfortable bed can substitute for a chair, but only if you don't have one.
             rest += 0.2f * ( units::to_celsius_delta( floor_bedding_warmth( your_pos ) ) / 2.0f );
         }
-        if( activity_level() <= NO_EXERCISE ) {
+        if( ur_act_level <= NO_EXERCISE ) {
             rest += 0.2f;
         }
     }
     // These stack!
-    if( activity_level() >= BRISK_EXERCISE ) {
+    if( ur_act_level >= BRISK_EXERCISE ) {
         rest -= 0.1f;
     }
-    if( activity_level() >= ACTIVE_EXERCISE ) {
+    if( ur_act_level >= ACTIVE_EXERCISE ) {
         rest -= 0.2f;
     }
-    if( activity_level() >= EXTRA_EXERCISE ) {
+    if( ur_act_level >= EXTRA_EXERCISE ) {
         rest -= 0.3f;
     }
+    add_msg_debug( debugmode::DF_CHAR_HEALTH, "%s resting quality: %.6f", get_name(), rest );
     return rest;
 }
 
@@ -6437,7 +6439,8 @@ float Character::healing_rate_medicine( float at_rest_quality, const bodypart_id
     }
 
     rate_medicine *= mutation_value( "healing_multiplier" );
-    rate_medicine *= 1.0f + clamp( at_rest_quality, 0.0f, 1.0f );
+    // Sufficiently negative rest quality can completely eliminate your healing, but never turn it negative.
+    rate_medicine *= 1.0f + std::max( at_rest_quality, -1.0f );
 
     // increase healing if character has both effects
     if( has_effect( effect_bandaged ) && has_effect( effect_disinfected ) ) {