Defamation and Mental Health: When False Allegations Cause Psychological Harm

Defamation is rarely just a legal problem. For most people who have experienced a sustained campaign of false allegations — whether online or offline — the psychological impact is severe, lasting, and often debilitating. This guide explains how psychological harm interacts with UK defamation law: how it affects the serious harm test, how it can increase the damages you recover, and how it can be properly evidenced in legal proceedings.

The Psychological Reality of Defamation

Clinical research and the lived experience of our clients consistently show that being publicly defamed — particularly through social media pile-ons, sustained online campaigns, or false allegations that spread through professional networks — causes measurable psychiatric harm. Common presentations include acute anxiety, clinical depression, post-traumatic stress disorder (PTSD), social withdrawal, sleep disorders, and in severe cases, suicidal ideation. The harm is compounded when the defamatory content remains online and continues to be found by employers, colleagues, family members, and potential partners long after the initial publication.

How Psychological Harm Interacts with the Serious Harm Test

Under the Defamation Act 2013, a claim can only proceed if the publication caused or was likely to cause serious harm to the claimant's reputation. Psychological harm is not, in itself, the test — the Act focuses on reputational harm, not personal distress. However, documented psychological harm is compelling evidence of the impact of the defamatory statement on the claimant's life and relationships, which in turn supports the inference that the reputational damage was serious. Courts take this evidence seriously.

Aggravated Damages Where the Defendant Has Prolonged the Harm

Where a defendant has acted in a way that has aggravated the claimant's psychological suffering — for example, by refusing to remove content after being formally notified, by posting further defamatory content in response to legal correspondence, or by conducting a sustained public campaign — the court can award aggravated damages in addition to the basic compensatory award. Aggravated damages are specifically intended to compensate for the additional distress caused by the defendant's high-handed or malicious conduct.

In practice, a defendant who continues to publish after receiving a solicitor's letter, who denies patently false allegations in public, or who actively encourages others to join a campaign against the claimant is likely to face a significantly higher damages award as a result of that conduct.

What Medical Evidence Is Required?

In cases where psychological harm forms a significant part of the damages claim, courts expect medical evidence. This typically includes:

• A GP's letter or referral documenting the claimant's presentation
• A psychiatric or psychological report from a qualified expert (in severe cases)
• Records of prescribed medication for anxiety, depression, or PTSD
• Evidence of sick leave, career interruption, or loss of income attributable to the psychological impact
• Evidence of therapy or counselling sessions

We work closely with clients to ensure that this evidence is gathered and presented in the most effective way. We also liaise with treating clinicians where appropriate.

The Interaction with Personal Injury Claims

Defamation and personal injury (PI) are distinct torts. However, where defamatory publications have caused clinically recognised psychiatric illness, it may be possible to pursue a PI claim alongside or instead of a defamation claim — for example, where the defamatory conduct also constitutes harassment under the Protection from Harassment Act 1997. The harassment claim can be particularly powerful where the campaign is ongoing and involves multiple acts of publication, as it entitles the claimant to both injunctive relief and damages for anxiety and financial loss.

Signposting: Support Alongside Legal Action

We recognise that legal proceedings are themselves a source of stress, and that clients dealing with the psychological consequences of defamation need more than legal advice. We always signpost clients to appropriate support organisations, including:

• Samaritans (116 123) — 24-hour emotional support
• Mind (mind.org.uk) — mental health information and support
• Victim Support (victimsupport.org.uk) — support for victims of online abuse
• Citizens Advice — practical support and signposting

Related Reading

UK Defamation Law Guide | Serious Harm (Glossary) | Online harassment and UK law