Emotion

Emotion is a gameplay feature introduced in The Sims 4. Emotion is a core part of a Sims'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. A punching bag can be used to relieve the Sim from the Emotion. Currently Unknown.
 * Bored : Currently Unknown. Received when the Fun Need is low.
 * Confident - Very Confident : Helps Social Related Performance. Can be received from the Self-Confident trait when waking up, practicing speech in front of a mirror or when winning a fight with a Sim.
 * Cranky : Currently Unknown, expected to improve a Sim's inventing abilities. Currently Unknown
 * Dazed : Currently Unknown.. Currently Unknown
 * Embarrassed - Very Embarrassed : Currently Unknown. Can be received from being humiliated in a discussion while multiple Sims are present.
 * Energized : Helps sports related performance. Can be received from drinking Energy Drinks, Jogging or taking a quirky shower
 * Fine : The default emotional state of a Sim. Happens when a Sim doesn't have any moodlets.
 * Flirty - Very Flirty - Passionate : Makes Sims better at romantic interactions. Can be received from Steam Showers and successing in doing romantic social interactions.
 * Focused : Boosts Logic performance. Can be received from practicing Chess, using the telescope, microscope or reading a book.
 * Happy - Elated : 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.
 * 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.
 * Hysterical : Negatively Impacts Social Interactions. Can be received when the Sim has low Social Need.
 * Playful - Very Playful : Helps with social interactions. Can be received from using friendly social commands on Sims.
 * Uncomfortable - Very Uncomfortable : Happens when a Sim has negative moodlets that derive from Low Needs.
 * Sad - Very Sad - Currently Unknown : Currently Unknown
 * Stressed  Sim does the more stressful variants of actions. Can be received from working.

Emotional death
Sims with prolonged and extreme emotions can die as a result of their emotions. There are several emotional deaths, but not every emotional state has an associated death.