What Is Sex Work? Concepts, Rights, Health and Harm Reduction

As a doctor, I don't see the question "is sex work morally right or wrong?" as the main issue. The public-health question is how to make the people who do this work safe, free from infection, free from violence, and confident enough to come and see a doctor. This article explains the basic concepts from an academic and human-rights perspective, as a foundation for reading Sex worker health and Sex work law in Thailand.

Definition: what sex work is, and what it isn't

The World Health Organization (WHO) and the Joint United Nations Programme on HIV/AIDS (UNAIDS) use the term sex workers to mean adults who receive money or goods in exchange for sexual services, whether regularly or occasionally. It covers all genders: women, men and transgender people. The core of the definition is consent between adults.

What is not sex work, and must be kept clearly separate:

• Human trafficking is recruiting, moving or controlling people through force, threats, deception or abuse of vulnerability in order to exploit them, as defined by the United Nations Palermo Protocol (2000). Where there is coercion, "consent" has no meaning, and the person affected is a victim, not an offender.
• Involvement of children. A person under 18 cannot be a sex worker. Every case is commercial sexual exploitation of a child and a serious crime, whether or not the child "agreed". Sex worker rights organisations around the world are united on this point.

Separating these three things matters a great deal. When everything is lumped together as "trafficking", policy often ends up with raids that arrest adults working voluntarily, while real victims stay hidden underground.

Sex work

Consenting adults

• Adults aged 18 and over
• Provided voluntarily
• In exchange for money or goods
• Need rights and health care

Human trafficking

Trafficking

• Force, threats or deception
• Consent has no meaning
• The person is a victim
• A serious crime

Involving children

Under 18

• Never sex work, in any case
• It is child exploitation
• Always illegal even if the child "agrees"
• Report to 1300 or 191

Based on WHO/UNAIDS definitions and the UN Palermo Protocol (2000).

The "sex work is work" framing

The term "sex work" came into wide use through the US activist Carol Leigh in the late 1970s, as an alternative to stigmatising words. The "sex work is work" framing holds that consensual adult sex work should have the same protections as other work, such as:

• Labour rights, workplace safety and access to social security.
• The right to refuse clients and to set conditions, such as condom use.
• The right to report violence to the police without fear of being arrested themselves.

In academic debate there is another perspective, the abolitionist view, which sees commercial sex as inherently oppressive and aims to reduce demand. This view is the origin of the "Nordic model" described below. I want readers to know there is genuine debate, but from a public-health point of view, the measurable question is which policies keep people safer and healthier.

Four legal models around the world

A common confusion is that legalisation and decriminalisation are not the same. Under legalisation, the state controls the industry tightly, and those who are not registered, often the most vulnerable, such as migrant workers, remain outside the law. Decriminalisation treats the work like other work; Belgium, for example, passed a law recognising employment contracts and labour rights for sex workers, which took effect in 2024.

Every model still strictly criminalises trafficking, coercion and the exploitation of children.

Criminalization

• Seller, buyer and third parties all liable
• Many countries, Thailand close to this

Nordic model

Partial criminalization

• Seller not liable, buyer liable
• Sweden 1999, France 2016

Legalization

Regulated

• Licensing, registration
• Netherlands, Germany

Decriminalization

• Governed by labor law
• New Zealand 2003, Belgium 2022

WHO (2022), UNAIDS and The Lancet (2014) link decriminalization with lower HIV risk. Every model still punishes trafficking and child exploitation.

Health evidence: how the law affects HIV

• The Lancet (Series on HIV and Sex Workers, 2014): Shannon and colleagues used epidemiological modelling and found that decriminalising sex work was the structural factor with the greatest effect on the course of HIV epidemics in all settings studied, projected to avert around 33–46% of HIV infections over the following decade.
• A systematic review in PLoS Medicine (Platt and colleagues, 2018) found that repressive policing, such as raids or confiscating condoms as evidence, was associated with more violence and higher HIV/STI risk, because people had to work in hidden places, found it harder to negotiate condoms and were afraid to use services. These harms were seen both where sellers were criminalised and where clients were criminalised.
• WHO (key populations guidelines, 2022) and UNAIDS recommend decriminalising sex work, and removing stigmatising laws and enforcement practices, as part of ending HIV. Amnesty International (2016) has a policy supporting decriminalisation from a human-rights perspective.

Put simply: when people don't have to fear the law, they can carry condoms, refuse unsafe clients, report violence and come for health checks, which is better for the health of the whole community.

Thailand's law today

Here is a short summary; for details by section, read Sex work law in Thailand.

• The Prevention and Suppression of Prostitution Act B.E. 2539 (1996) is still in force. It does not recognise sex work as an occupation. It penalises public soliciting and advertising, and imposes very heavy penalties on procurers, brothel operators, coercion and every case involving people under 18. Thailand is therefore close to the "criminalisation" model, although penalties for adult sellers are mostly fines or short sentences.
• Reform progress. In May 2026, the Empower Foundation and partner networks submitted a citizens' draft Sex Worker Protection Bill with 11,765 signatures to the House of Representatives, proposing to repeal the 1996 Act and recognise labour rights. The draft was classed as a money-related bill, so it needs the Prime Minister's endorsement first. In August 2026 the network petitioned the Prime Minister for that endorsement. As of October 2026, I have found no report that it has been endorsed or has reached parliamentary debate.

What has not changed, even under the current law, is that everyone has the right to medical care, and health information is confidential under Section 7 of Thailand's National Health Act B.E. 2550 (2007).

Stigma: a bigger barrier than any germ

Stigma makes it hard for sex workers to access services at several levels:

• From health workers: judgemental questions, looks or lectures mean many people never come back.
• From the law and its enforcement: fear that carrying condoms or visiting a clinic could be used as evidence.
• From society and family: having to hide their work leaves people without support when problems arise.
• From within (internalised stigma): feeling undeserving of care.

Stigma also overlaps with other identities. Sex workers who are transgender, men who have sex with men, migrant workers or people who use drugs face multiple layers of barriers. Thailand has community-run Key Population-Led Health Services in many areas, which help close this gap considerably.

Health services sex workers should receive

The WHO 2022 guidelines for key populations set out a comprehensive package covering both prevention and emotional wellbeing:

• HIV prevention: daily PrEP or on-demand PrEP (2-1-1) for those it suits, the injectable option, and PEP within 72 hours if a condom breaks or someone is coerced.
• Regular STI testing, especially at every site of exposure, because many infections cause no symptoms. Read PCR STI testing for 14 infections and Syphilis.
• Enough condoms and lubricant. Read Why lubricant matters more than you think.
• Doxy-PEP for some people with repeated bacterial STIs, according to a doctor's assessment.
• Vaccines: HPV, hepatitis B and others depending on risk.
• Care after violence: examination after sexual assault, preventive medicines, and social and legal support.
• Mental health and substance use: counselling, care for stress or depression, and harm reduction for drug use. Read What is chemsex, and how to reduce harm.
• People living with HIV: ongoing treatment to an undetectable viral load, which means HIV is not transmitted sexually. Read U=U.

These services work best when they are confidential, non-judgemental and easy to reach, which are the same principles WHO sets out.

When to see a doctor, and how the clinic can help

See a doctor promptly if:

• A condom breaks, slips off or is removed without consent, or you are coerced. Start PEP within 72 hours; the sooner the better. See the steps in Just had a risk? What to do next.
• You have sores, bumps, pus, unusual discharge, burning when passing urine, or a body rash.
• You have been assaulted. In Thailand, call 1669 for medical emergencies, 191 for the police or 1300 for the Social Assistance Centre. If you are struggling emotionally, call 1323, Thailand's free 24-hour mental-health hotline (Thai language; ask for English support).

At Dr. Kris Clinic we care for everyone without judging their work. We offer HIV and STI testing, PrEP/PEP and doxy-PEP planning where appropriate, vaccines, and confidential mental-health support, both at the clinic in Surat Thani and online, with English-speaking consultations available. If you need help beyond what a clinic can offer, such as legal support or shelter, we'll help point you to the right services.