Cyclothymic disorder: steadying the waves without dimming the person — a therapist's manual

1. The programme at a glance

Indication. Adult with cyclothymic disorder, outside a full episode, followed by a psychiatrist or a doctor; adolescents and young adults with the adaptations in section 39.

Reference model. Cognitive behavioural therapy for mood disorders adapted to chronic instability: psychoeducation, daily mood monitoring, regular rhythms, work on the thoughts and behaviours of highs and lows, emotion regulation, work on rejection sensitivity, and well-being therapy. The main ones are described in sections 33 to 37.

Format. Sixteen sessions over five to seven months, weekly and then spaced out. Sessions of 50 minutes. One session with someone close if the person wishes, in addition to the sixteen, preferably after session 14, when the model, the daily mood log and the plan can be shared. Three booster sessions after that, at one, three and six months after session 16, with their dates set at session 16.

Targeted mechanism. Reduce the amplitude and consequences of mood variations by making the waves visible, stabilising rhythms, reducing emotional and interpersonal reactivity, limiting decisions made at the crest or in the trough of a wave, and developing well-being.

Phase	Session	Topic	Session output
I. Understanding	1	Meeting	Reason for consulting and consequences gathered
	2	Assessing	Differential diagnosis, risks, comorbidities
	3	Understanding cyclothymia	Model explained, life chart sketched
	4	Observing mood	Daily log started
II. Recognising	5	The highs	Signs and thoughts of highs
	6	The lows	Signs and thoughts of lows
	7	Rhythms and sleep	Fixed times, daily anchors
III. Regulating	8	When emotion overflows	One reaction broken down, one skill chosen
	9	Rejection sensitivity	Two interpretations loosened
	10	Mid-point review	Log reviewed, plan revised
	11	Before deciding	Delay rule written
	12	Substance use and stimulants	One goal chosen
IV. Consolidating	13	Well-being	Well-being diary started
	14	My plan	Plan for highs, lows and emergencies
	15	Who I am, beyond the waves	What I keep of my temperament
	16	Review and next steps	Measures repeated, boosters scheduled

What the person takes away. Seven printable worksheets, listed in section 42: my waves, my log, my highs and my lows, when emotion overflows, before deciding, my well-being, my plan.

What sets this programme apart from the other manuals on this site. Three things. A chronic, fluctuating disorder, in which the point is not to prepare for an episode, but to learn to live with waves. A central place for emotional and interpersonal reactivity, which often does the most damage. And attention to what the person wants to keep of their intensity.

2. Before you begin

The four preliminary decisions

1. Is there a full episode now, or in the history? If so, the diagnosis needs revisiting with the psychiatrist. A manic episode, or a hypomanic episode together with a major depressive episode, amounts to bipolar disorder, and Bipolar disorder: psychoeducation and relapse prevention — a therapist's manual is a better fit. Sections 7 and 40.

2. Has suicide risk been assessed? Section 9.

3. Is a doctor involved? For assessment, any medication, and in particular an antidepressant prescription. Section 13.

4. What else is present? Substance use, attention deficit, personality disorder, anxiety. Section 8.

What this programme does not treat

Bipolar I or II disorder, which has its own manual, Bipolar disorder: psychoeducation and relapse prevention — a therapist's manual.

Borderline personality disorder in the foreground, which has its own manual, Borderline personality: a therapist's manual; the two can coexist.

Severe, unstabilised addiction, which is first a matter for addiction services (section 40).

How to use it

Read sections 3 to 15 first, then sections 33 to 37 before the first session. Section 43 sets out what not to let go.

3. The clinical picture

Numerous, long-lasting waves

High periods: energy, confidence, many ideas, reduced need for sleep, sociability, plans, spending, irritability, sometimes disinhibition. In the DSM-5-TR, the American Psychiatric Association's classification, they stay short of a hypomanic episode, in intensity, duration or number of symptoms; ICD-11, the World Health Organization's classification, accepts that some reach it (section 6). According to the DSM-5-TR, a hypomanic episode requires at least four consecutive days of elevated, expansive or irritable mood and increased activity or energy, with several other symptoms and a change that other people notice.

Low periods: fatigue, loss of interest, pessimism, withdrawal, guilt, hypersomnia, sometimes thoughts of death. They stay short of a major depressive episode.

Frequent and often abrupt variations, sometimes over a few days or a few hours, sometimes triggered by an event, sometimes with no apparent reason.

Mixed periods, in which energy and agitation accompany a dark mood.

Reactivity

Many people describe intense emotional reactivity: emotions that rise quickly and strongly, and come down slowly. And marked interpersonal sensitivity: the slightest criticism, the slightest delay in a reply, the slightest sign of distance triggers a drop or anger.

What people describe

"I never know how I'm going to wake up." "People tell me I have an impossible character." "I start everything and finish nothing." "When things are good, I'm the funniest person at the party; three days later, I can't answer the phone." People also often describe a deep weariness with this instability, and with the image of them it gives.

What you see in the consulting room

Most often, the person comes because of a low period, a break-up, conflicts at work, substance use, or because someone close has pushed them to. The highs are rarely the reason: they are often experienced as the "real" person.

Epidemiology

Cyclothymia affects around 0.4 to 1% of the population over the lifetime depending on the study, and its frequency is higher among people who seek consultation, particularly for depression. It usually begins in adolescence or early adulthood, often insidiously. Its frequency is comparable in men and women in the general population.

Course

The disorder is chronic, with variations over the years. It carries a risk of progression to bipolar I or II disorder, estimated within a wide range, of the order of 15 to 50% depending on studies and populations. And it has an often underestimated impact on relationships, studies, work and health.

4. An unrecognised disorder

Why this section exists

Because cyclothymia is often diagnosed late, after years of consultations for other reasons (Perugi et al., 2015; Van Meter et al., 2012), and the person has often internalised the idea that they have "a nasty temper".

Why it gets missed

Highs are not reported: they are experienced as good times.

Lows look like depressions and are treated as such.

Interpersonal reactivity suggests a personality disorder.

Restlessness and difficulties with organisation suggest an attention deficit.

Substance use masks the picture.

Chronicity makes it look like a character trait.

What this changes for you

You actively look for highs, including by asking those close to the person. You trace the history of mood over years (National Institute for Health and Care Excellence, 2014; Vieta et al., 2018). And you help the person distinguish what belongs to a disorder that can be worked on from what belongs to their personality.

What you say

"What you're describing has a name. It isn't a character flaw: it's a mood that varies a lot and often, and has done for a long time. And there are ways of helping to steady it, which we're going to work on together."

5. The model

A temperament and triggers

A vulnerability — often familial, biological, linked to temperament — makes mood more sensitive to triggers: disruptions to sleep and rhythms, interpersonal events, stress, substance use, stimulants, seasons, certain medications.

In this manual, temperament refers to the person's lasting way of being — intensity, reactivity, drive: it is part of them, and it is respected. The disorder refers to the amplitude, frequency and consequences of mood variations: that is what the treatment targets. The cyclothymic temperament described by Akiskal links the two: a trait, also present outside any disorder, that increases vulnerability and of which the disorder may be an exaggeration (Perugi et al., 2017).

The circle of highs

A trigger — a success, a new encounter, a short night — increases energy. Thoughts speed up and become more optimistic; the person sleeps less, takes on more commitments, seeks out more stimulation. Lack of sleep and overload feed the high, until exhaustion or a crash.

The circle of lows

A trigger — a criticism, a failure, the fatigue that follows a high — brings mood down. Thoughts become negative about oneself and the future; the person withdraws, abandons what they had started, sleeps too much. Withdrawal and shame about unkept commitments feed the low.

Interpersonal reactivity

Rejection sensitivity leads to ambiguous signals being quickly read as signs of disinterest or criticism. Emotion rises fast; the reaction — anger, withdrawal, an impulsive message — sometimes produces the feared rejection, and confirms the person's conviction that they are being rejected.

The cost of the waves

Decisions made at the crest or in the trough of a wave — resignations, break-ups, spending, commitments — leave consequences that in turn become triggers.

What the model explains to the person

That their waves have identifiable triggers. That sleep and rhythms dampen them. That their thoughts change with mood, and can be treated with caution at the crest and in the trough. That their reactivity can be worked on. And that their intensity is not the problem: amplitude and damage are.

---