diff --git a/code/__defines/chemistry.dm b/code/__defines/chemistry.dm
index 6994f08cd1b..682e55b81b1 100644
--- a/code/__defines/chemistry.dm
+++ b/code/__defines/chemistry.dm
@@ -25,6 +25,10 @@
 #define REAGENTS_BURNING_TEMP_LOW_DAMAGE 0.00005 //Damage per celcius per unit below the REAGENTS_BURNING_TEMP_LOW define per unit.
 #define REAGENTS_BURNING_TEMP_LOW_DAMAGE_CAP 20 //Maximum amount of burn damage to deal due to low temperature reagents.
 
+#define REAGENTS_BODYTEMP 0.002 //Increase in body temperature per unit per celcius above current body temperature.
+#define REAGENTS_BODYTEMP_MIN 0.25 //Minimum amount of increase to actually increase body temperature. The increase is also rounded to this value.
+#define REAGENTS_BODYTEMP_MAX 10 //Maximum allowed increase in body temperature (K) per unit.
+
 #define CHEM_SYNTH_ENERGY 500 // How much energy does it take to synthesize 1 unit of chemical, in Joules.
 
 // Some on_mob_life() procs check for alien races.
diff --git a/code/controllers/subsystems/chemistry.dm b/code/controllers/subsystems/chemistry.dm
index a48aa3efcde..9d81c6f9ab3 100644
--- a/code/controllers/subsystems/chemistry.dm
+++ b/code/controllers/subsystems/chemistry.dm
@@ -11,24 +11,29 @@ var/datum/controller/subsystem/chemistry/SSchemistry
 	var/list/chemical_reagents
 
 	var/tmp/list/processing_holders = list()
-	
-/datum/controller/subsystem/chemistry/proc/has_valid_specific_heat(var/datum/reagent/R) //Used for unit tests
+
+/datum/controller/subsystem/chemistry/proc/has_valid_specific_heat(var/datum/reagent/R) //Used for unit tests. Same as check_specific_heat but returns a boolean instead.
 
 	if(R.specific_heat > 0)
-		return TRUE	
+		return TRUE
+
 	if(chemical_reagents[R.id].specific_heat > 0) //Don't think this will happen but you never know.
 		return TRUE
-		
+
 	var/datum/chemical_reaction/recipe = find_recipe_by_result(R.id)
 	if(recipe)
 		for(var/chem in recipe.required_reagents)
 			if(!has_valid_specific_heat(chemical_reagents[chem]))
-				return FALSE
+				log_ss("chemistry", "ERROR: [recipe.type] has an improper recipe!")
+				return R.fallback_specific_heat > 0
 
-	if(R.fallback_specific_heat)
 		return TRUE
-
-	return FALSE
+	else
+		if(R.fallback_specific_heat > 0)
+			return TRUE
+		else
+			log_ss("chemistry", "ERROR: [R.type] does not have a valid specific heat ([R.specific_heat]) or a valid fallback specific heat ([R.fallback_specific_heat]) assigned!")
+			return FALSE
 
 /datum/controller/subsystem/chemistry/proc/check_specific_heat(var/datum/reagent/R)
 
@@ -44,15 +49,17 @@ var/datum/controller/subsystem/chemistry/SSchemistry
 		var/result_amount = recipe.result_amount
 		for(var/chem in recipe.required_reagents)
 			var/chem_specific_heat = check_specific_heat(chemical_reagents[chem])
-			if(!chem_specific_heat)
+			if(chem_specific_heat <= 0)
 				log_ss("chemistry", "ERROR: [R.type] does not have a specific heat value set, and there is no associated recipe for it! Please fix this by giving it a specific_heat value!")
+				final_heat = 0
+				break
 			final_heat += chem_specific_heat * (recipe.required_reagents[chem]/result_amount)
 
 		if(final_heat > 0)
 			chemical_reagents[R.id].specific_heat = final_heat
 			return final_heat
 
-	if(R.fallback_specific_heat)
+	if(R.fallback_specific_heat > 0)
 		chemical_reagents[R.id].specific_heat = R.fallback_specific_heat
 		return R.fallback_specific_heat
 
diff --git a/code/game/objects/items/bees_items.dm b/code/game/objects/items/bees_items.dm
index e1eeda23998..2f15d1aecb2 100644
--- a/code/game/objects/items/bees_items.dm
+++ b/code/game/objects/items/bees_items.dm
@@ -43,6 +43,7 @@
 	id = "honey"
 	description = "A golden yellow syrup, loaded with sugary sweetness."
 	color = "#FFFF00"
+	fallback_specific_heat = 0.75
 
 /obj/item/weapon/book/manual/hydroponics_beekeeping
 	name = "The Ins and Outs of Apiculture - A Precise Art"
diff --git a/code/game/objects/items/weapons/cigs_lighters.dm b/code/game/objects/items/weapons/cigs_lighters.dm
index 115c4efced9..fdba2ceff3d 100644
--- a/code/game/objects/items/weapons/cigs_lighters.dm
+++ b/code/game/objects/items/weapons/cigs_lighters.dm
@@ -106,7 +106,7 @@ CIGARETTE PACKETS ARE IN FANCY.DM
 
 /obj/item/clothing/mask/smokable/process()
 
-	if(reagents && reagents.total_volume)
+	if(reagents && reagents.total_volume && burn_rate)
 		if(!initial_volume)
 			initial_volume = reagents.total_volume
 		var/mob/living/carbon/human/C = loc
diff --git a/code/modules/reagents/Chemistry-Reagents.dm b/code/modules/reagents/Chemistry-Reagents.dm
index cb49433aa72..73ac8c0605e 100644
--- a/code/modules/reagents/Chemistry-Reagents.dm
+++ b/code/modules/reagents/Chemistry-Reagents.dm
@@ -81,8 +81,9 @@
 
 	dose = min(dose + removed, max_dose)
 
-	//Not based on science, based on balance.
-	M.bodytemperature += Clamp( ((get_temperature() - (T0C + 20)) * removed * 0.002),-5*removed,5*removed)
+	var/bodytempchange = Clamp((get_temperature() - M.bodytemperature) * removed * REAGENTS_BODYTEMP,-REAGENTS_BODYTEMP_MAX * removed, REAGENTS_BODYTEMP_MAX * removed)
+	if(abs(bodytempchange) >= REAGENTS_BODYTEMP_MIN)
+		M.bodytemperature += round(bodytempchange,REAGENTS_BODYTEMP_MIN)
 
 	for(var/datum/reagent/R in M.bloodstr.reagent_list)
 		if(istype(R, conflicting_reagent))
diff --git a/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Core.dm b/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Core.dm
index 84836a97195..8b71cb11650 100644
--- a/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Core.dm
+++ b/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Core.dm
@@ -130,6 +130,7 @@
 	reagent_state = LIQUID
 	color = "#C81040"
 	taste_description = "slime"
+	fallback_specific_heat = 1.2
 
 /datum/reagent/vaccine/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	if(data)
@@ -153,6 +154,7 @@
 	reagent_state = LIQUID
 	color = "#0050F0"
 	taste_description = "slime"
+	fallback_specific_heat = 1.5
 
 /datum/reagent/antibodies/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	if(src.data)
diff --git a/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Food-Drinks.dm b/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Food-Drinks.dm
index 7593447c410..4f3f3ccbcc6 100644
--- a/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Food-Drinks.dm
+++ b/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Food-Drinks.dm
@@ -527,6 +527,7 @@
 	reagent_state = SOLID
 	color = "#000000"
 	taste_description = "pepper"
+	fallback_specific_heat = 1.25
 
 /datum/reagent/enzyme
 	name = "Universal Enzyme"
@@ -537,6 +538,7 @@
 	overdose = REAGENTS_OVERDOSE
 	taste_description = "sweetness"
 	taste_mult = 0.7
+	fallback_specific_heat = 1
 
 /datum/reagent/frostoil
 	name = "Frost Oil"
@@ -566,11 +568,14 @@
 	color = "#B31008"
 	taste_description = "hot peppers"
 	taste_mult = 1.5
+	fallback_specific_heat = 2
+
 	var/agony_dose = 5
 	var/agony_amount = 1
 	var/discomfort_message = "<span class='danger'>Your insides feel uncomfortably hot!</span>"
 	var/slime_temp_adj = 10
 
+
 /datum/reagent/capsaicin/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	M.adjustToxLoss(0.5 * removed)
 
@@ -591,6 +596,9 @@
 		M.bodytemperature += rand(0, 15) + slime_temp_adj
 	holder.remove_reagent("frostoil", 5)
 
+#define EYES_PROTECTED 1
+#define EYES_MECH 2
+
 /datum/reagent/capsaicin/condensed
 	name = "Condensed Capsaicin"
 	id = "condensedcapsaicin"
@@ -603,10 +611,9 @@
 	agony_amount = 4
 	discomfort_message = "<span class='danger'>You feel like your insides are burning!</span>"
 	slime_temp_adj = 15
+	fallback_specific_heat = 4
 
 /datum/reagent/capsaicin/condensed/affect_touch(var/mob/living/carbon/M, var/alien, var/removed)
-#define EYES_PROTECTED 1
-#define EYES_MECH 2
 	var/eyes_covered = 0
 	var/mouth_covered = 0
 	var/no_pain = 0
@@ -662,10 +669,7 @@
 			M.custom_emote(2, "[pick("coughs!","coughs hysterically!","splutters!")]")
 		M.apply_effect(40, AGONY, 0)
 
-#undef EYES_PROTECTED
-#undef EYES_MECH
-
-/datum/reagent/condensedcapsaicin/affect_ingest(var/mob/living/carbon/M, var/alien, var/removed)
+/datum/reagent/capsaicin/condensed/affect_ingest(var/mob/living/carbon/M, var/alien, var/removed)
 	if(ishuman(M))
 		var/mob/living/carbon/human/H = M
 		if(H.species && (H.species.flags & NO_PAIN))
@@ -680,6 +684,9 @@
 		M.bodytemperature += rand(15, 30)
 	holder.remove_reagent("frostoil", 5)
 
+#undef EYES_PROTECTED
+#undef EYES_MECH
+
 /datum/reagent/spacespice
 	name = "Space Spice"
 	id = "spacespice"
@@ -688,6 +695,7 @@
 	color = "#e08702"
 	taste_description = "spices"
 	taste_mult = 1.5
+	fallback_specific_heat = 2
 
 /datum/reagent/browniemix
 	name = "Brownie Mix"
@@ -3804,4 +3812,4 @@
 	description = "A delicious seasonal flavoring."
 	color = "#AE771C"
 	taste_description = "autumn bliss"
-	
+
diff --git a/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Medicine.dm b/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Medicine.dm
index ac8c1bfad75..a9e2903e7f4 100644
--- a/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Medicine.dm
+++ b/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Medicine.dm
@@ -581,6 +581,8 @@
 	var/list/withdrawal_traumas //List of withdrawl effects that the medication permanently adds during withdrawl, with the key being the brain trauma, and the value being the base percent chance to add.
 	var/list/suppressing_reagents = list() // List of reagents that suppress the withdrawal effects, with the key being the reagent and the vlue being the minimum dosage required to suppress.
 
+	fallback_specific_heat = 1.5
+	
 /datum/reagent/mental/affect_blood(var/mob/living/carbon/human/H, var/alien, var/removed)
 
 	if(!istype(H) || max_dose < min_dose || (world.time < data && volume > removed) || messagedelay == -1)
@@ -1136,6 +1138,7 @@
 	color = "#BF0000"
 	taste_description = "bitter metal"
 	overdose = 5
+	fallback_specific_heat = 1.2
 
 /datum/reagent/azoth/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	..()
@@ -1222,6 +1225,7 @@
 	color = "#ffd700"
 	affects_dead = 1
 	taste_description = "eternal blissfulness"
+	fallback_specific_heat = 2
 
 /datum/reagent/elixir/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	if(ishuman(M))
diff --git a/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Toxins.dm b/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Toxins.dm
index 3c3bbe6b706..081715c759b 100644
--- a/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Toxins.dm
+++ b/code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Toxins.dm
@@ -509,6 +509,8 @@
 	glass_name = "glass of beer"
 	glass_desc = "A freezing pint of beer"
 	glass_center_of_mass = list("x"=16, "y"=8)
+	
+	fallback_specific_heat = 1.2
 
 /* Drugs */
 
@@ -544,6 +546,7 @@
 	metabolism = REM * 0.25
 	overdose = REAGENTS_OVERDOSE
 	taste_description = "bitterness"
+	fallback_specific_heat = 1.2
 
 /datum/reagent/serotrotium/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	var/mob/living/carbon/human/H = M
@@ -611,6 +614,7 @@
 	overdose = REAGENTS_OVERDOSE
 	metabolism = REM * 0.5
 	taste_description = "mushroom"
+	fallback_specific_heat = 1.2
 
 /datum/reagent/psilocybin/affect_blood(var/mob/living/carbon/M, var/alien, var/removed)
 	var/mob/living/carbon/human/H = M
@@ -696,6 +700,7 @@
 	reagent_state = LIQUID
 	color = "#535E66"
 	taste_description = "slimey metal"
+	fallback_specific_heat = 3
 
 /datum/reagent/nanites/affect_touch(var/mob/living/carbon/M, var/alien, var/removed)
 	if(prob(10))
@@ -711,6 +716,7 @@
 	reagent_state = LIQUID
 	color = "#535E66"
 	taste_description = "sludge"
+	fallback_specific_heat = 2
 
 /datum/reagent/xenomicrobes/affect_touch(var/mob/living/carbon/M, var/alien, var/removed)
 	if(prob(10))
diff --git a/code/modules/reagents/Chemistry-Temperature.dm b/code/modules/reagents/Chemistry-Temperature.dm
index 1fef4cc4134..9734dae2375 100644
--- a/code/modules/reagents/Chemistry-Temperature.dm
+++ b/code/modules/reagents/Chemistry-Temperature.dm
@@ -26,15 +26,17 @@
 
 /datum/reagents/proc/get_temperature()
 	var/HC = get_heat_capacity()
-	if(HC)
-		return get_thermal_energy() / (HC)
+	var/TE = get_thermal_energy()
+	if(HC && TE)
+		return TE / HC
 	else
 		return T0C + 20
 
 /datum/reagent/proc/get_temperature()
 	var/HC = get_heat_capacity()
-	if(HC)
-		return get_thermal_energy() / (HC)
+	var/TE = get_thermal_energy()
+	if(HC && TE)
+		return TE / HC
 	else
 		return T0C + 20
 
diff --git a/html/changelogs/burgerbb - temperature fixes.yml b/html/changelogs/burgerbb - temperature fixes.yml
new file mode 100644
index 00000000000..d093b700abc
--- /dev/null
+++ b/html/changelogs/burgerbb - temperature fixes.yml	
@@ -0,0 +1,37 @@
+################################
+# Example Changelog File
+#
+# Note: This file, and files beginning with ".", and files that don't end in ".yml" will not be read. If you change this file, you will look really dumb.
+#
+# Your changelog will be merged with a master changelog. (New stuff added only, and only on the date entry for the day it was merged.)
+# When it is, any changes listed below will disappear.
+#
+# Valid Prefixes: 
+#   bugfix
+#   wip (For works in progress)
+#   tweak
+#   soundadd
+#   sounddel
+#   rscadd (general adding of nice things)
+#   rscdel (general deleting of nice things)
+#   imageadd
+#   imagedel
+#   maptweak
+#   spellcheck (typo fixes)
+#   experiment
+#   balance
+#################################
+
+# Your name.  
+author: BurgerBB
+
+# Optional: Remove this file after generating master changelog.  Useful for PR changelogs that won't get used again.
+delete-after: True
+
+# Any changes you've made.  See valid prefix list above.
+# INDENT WITH TWO SPACES.  NOT TABS.  SPACES.
+# SCREW THIS UP AND IT WON'T WORK.
+# Also, all entries are changed into a single [] after a master changelog generation. Just remove the brackets when you add new entries.
+# Please surround your changes in  double quotes ("), as certain characters otherwise screws up compiling. The quotes will not show up in the changelog.
+changes: 
+  - bugfix: "Fixed a bug that would cause you, your friends, and your loved ones to combust into the power of a million suns when consuming some reagent, such as nicotine from cigarettes."
\ No newline at end of file