Emotion

Emotion is a gameplay feature introduced in The Sims 4. Emotion is a core part of a Sim's simology. Emotion is similar to mood, but is more easily affected by in-game events and social interactions with other Sims. The current emotional state of a Sim is depicted in the lower left corner of the screen while playing. It is also noted that some objects in-game can affect the emotions of some Sims, though the Sim has to already be feeling a particular way in order for an object to affect them emotionally. Sims that are severely emotional can die from their emotions.

There are several ranges of emotions. Sims may reach one stage of an emotion and then progress to a second, more extreme stage of the same emotion. For instance, a Sim that is embarrassed may become very embarrassed. Sims that become extremely emotional may eventually suffer an emotional death.

Emotional States

 * Angry - Enraged - Furious : Negatively affects interactions, NPC Sims tend to be more aggressive, A punching bag can be used to relieve the Sim from the Emotion. Also, you can try to calm down an NPC Sim with the Emotional State.
 * Bored : Occurs during social interactions with Sims. Also, randomly occurs when children and teens come home from school, or when a secret  agent sim researches intelligence on the computer.
 * Confident - Very Confident : Helps Social Related Performance. Increases the rate at which the Charisma skill is gained. Can be received from the Self-Confident trait when waking up, practicing speech in front of a mirror, brushing teeth or when winning a fight with a Sim.
 * Dazed : Can be received when losing a fight, being electrocuted, or drinking a bottle of daze from a Cowplant.
 * Embarrassed - Very Embarrassed - Mortified : Can be received from being humiliated in a discussion while multiple Sims are present, having a bladder accident, or by walking in on another Sim bathing or on the toilet. If a sim becomes Mortified, he or she runs the risk of death.
 * Energized - Very Energized : Helps sports related progression. Can be received from drinking Energy Drinks, Jogging or taking a Brisk Shower
 * Fine : The default emotional state that occurs when a Sim has zero moodlets.
 * Flirty - Very Flirty - Passionate : Sims become flirty when they complete successful romantic interactions thus making further flirt interactions more successful.
 * Focused - Very Focused : Occurs when a Sim engages in mentally stimulating tasks such as practicing chess, using the telescope or microscope, reading a book or browsing simpedia on a computer. Being focused will also boost logic skill progression.
 * Happy - Very Happy : Sim performs a happier variant of actions. Also, boosts Social Performance. Can be obtained when good events happen, and when all the Needs are high. Cheerful Sims will sometimes get into this state on their own upon waking.
 * Inspired - Very Inspired : Helps Sims create better paintings, food, drinks and other craftable items. Can be received by taking a thoughtful shower, using the microscope and the telescope. Creative Sims sometimes get this on their own.
 * Playful - Very Playful - Hysterical : Helps with social interactions. Can be received from using friendly social commands on Sims.
 * Uncomfortable - Very Uncomfortable : This emotion occurs when a Sim has negative moodlets relating to their low needs or when sleeping in a cheap bed, using a cheap shower, or eating badly prepared food.
 * Sad - Very Sad : Changes how Sims approach actions and their style of walk. This emotion can occur when negative events happen to Sims such as losing a competition, the death of a family member and having a new sibling. It can also be caused by a low social need or randomly by the Gloomy trait.
 * Tense - Very Tense- Stressed : A Sim does the more stressful variants of actions. Will occur when a Sim's fun need is low.

Emotional death
Sims can die as a result from having prolonged and extreme emotions. There are several emotional deaths, but not every emotional state has an associated death. For example, Sims can die from embarrassment while mortified or by laughter while in the hysterical mood.

Emotional related actions
When having a specific emotion, the player may unlock new interactions, but it only happens when having the emotion.

For example, an energized Sim can do push-ups, sit-ups and stretch. A humiliated Sim may hide under the covers of his or her bed. An uncomfortable Sim can complain about their problems to other Sims. A confident Sim can tell an unbelievable story to other Sims. A sad Sim can cry under his or her covers and read obituaries on the computer. Playful Sims have access to some goofy social interactions, and happy Sims have some extra friendly interactions such as brightening another Sim's day and giving them a heartfelt compliment.

Trivia

 * Any Sim can achieve any of these emotional states from the following methods:
 * With the MySim trophies obtained from time capsules, based on color they can "emit" emotions that affect any Sims that enter the room
 * The Sims 3 Rewards lamps obtained from The Sims 4 website can also be used; these work the same as MySim trophies.
 * If a Sim survives being eaten from a Cowplant, they can milk the cowplant to get a potion which gives them the emotion they had before they got eaten. If a Sim gets devoured by a Cowplant, another Sim can milk the Cowplant to get Essence of Life which makes the Sim instantly happy as well as adding a few days to their age.