Borderline affective instability

Rapid reactive mood shifts, anger, emptiness

EmergentReview due

Compare (7)

At a glance

High-risk causes: 3
Immediate actions: 5
Related differentials: 6

Safety snapshot

Watch forSelf-harmsubstance misuseaggression

Presentation hinge

Sustained episodic activation plus decreased need for sleep are the key separators.

Separates the Mania / Hypomania / Mixed States group. It is not specific to Borderline affective instability.

Points for this presentation

Applies to the Mania / Hypomania / Mixed States group — not specific to Borderline affective instability

Sleep change is one of the highest-yield discriminators
Hypomania is commonly found only on careful retrospective history
One of the easiest high-risk states to miss
Acute stimulant states can mimic both mania and psychosis

Clinical review

Rows marked “Whole group”: Applies to the Mania / Hypomania / Mixed States group — not specific to Borderline affective instability

Why it fits

Rapid reactive mood shifts, anger, emptiness

Key features

Must-not-miss

Self-harm, substance misuse, aggression.

High-risk causes3 causes

Self-harm
substance misuse
aggression

Bedside question

Applies to the Mania / Hypomania / Mixed States group.

Sustained episodic activation plus decreased need for sleep are the key separators.

Helpful clues

Immediate action

Applies to the Mania / Hypomania / Mixed States group.

Sleep change is one of the highest-yield discriminators Hypomania is commonly found only on careful retrospective history One of the easiest high-risk states to miss Acute stimulant states can mimic both mania and psychosis Treat switching as diagnostically meaningful

Priority steps5 steps

1Sleep change is one of the highest-yield discriminators
2Hypomania is commonly found only on careful retrospective history
3One of the easiest high-risk states to miss
4Acute stimulant states can mimic both mania and psychosis
5Treat switching as diagnostically meaningful

Investigations

Applies to the Mania / Hypomania / Mixed States group.

None listed

Core tests

Mimics / overlap

Applies to the Mania / Hypomania / Mixed States group.

None listed

Consider

Clinical reference — not validated decision support. Review before use.