Borderline personality disorder
People with BPD feel emotions more easily, more deeply and for longer than others do. Emotions may repeatedly return and last a long time. Because of this, it may take longer than normal for people with BPD to return to a normal and stable emotional state. This can have both positive and negative effects. People with BPD often switching between being loving and happy and being sad and angry. They feel emotions in a stronger way than most people -  grief instead of sadness, rage instead of being annoyed, and panic instead of being anxious. People with BPD are especially sensitive to feelings of being abandoned, being alone, and being a "failure". They are often aware of how strong their emotions are, and, since they cannot control them, they sometimes shut them down entirely.