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Symptoms vary from person to person. The only way to be sure if you have HIV is to have an HIV test. You cannot tell from symptoms alone.

If you have HIV, it’s very important that it’s diagnosed, for the best chance of getting treatment and care, and of staying well.

Many people have a short, flu-like illness, often called a ‘seroconversion’ illness, soon after they are infected with HIV. Typical symptoms include a fever, sore throat, swollen glands, aches and pains, and a blotchy rash.

In some people this illness is so mild that it passes without being noticed. Some people mistake it for the flu, but for some people it is more severe and they may need to see a doctor. However, because the symptoms are similar to symptoms of many other conditions, HIV might not be diagnosed at the time. Click here to find out more about the symptoms of HIV seroconversion.

After this initial illness, it’s not uncommon for people to live with HIV and not to have any symptoms at all. But the virus will still be causing damage to the immune system, and without treatment most people with HIV will eventually become ill because of it. Click here to find out more about the stages of HIV infection.

HIV-related illnesses can cause a wide range of symptoms. These can include fevers and night sweats, a high temperature, a cough that won’t go away, unexplained weight loss, severe diarrhoea, bad headaches, or persistent mouth and skin problems. Of course, these can all have other causes.

HIV testing - Dr Laura Waters - Positive Champions
British HIV Association Chair Dr Laura Waters talks to Susan Cole about how important testing for HIV is.
Roger Pebody

Roger Pebody

Commissioning Editor

Roger joined aidsmap in 2008 and was Managing Editor from 2018 to 2024. As a freelancer, he now edits aidsmap’s news and conference coverage, as well as working on updates to About HIV pages. He is also a contributing science editor for TheBodyPro, a freelance journalist for The Lancet HIV, and a medical writer helping researchers prepare articles for peer-reviewed journals. He began working on HIV at Gay Men Fighting AIDS in the mid-1990s.

Basic information

Very recent infection

Very recent infection

HIV and the immune system

HIV and the immune system

What is the difference between HIV and AIDS?

Illustration of HIV virus.

Testing and health monitoring

Early HIV infection

A woman site on the sofa with a blanket over her and around her shoulders.

What are the symptoms of early HIV infection?

A woman is resting in bed.

Diagnosed with HIV at a low CD4 count

A vial of blood is resting on a form that indicates it will be tested for CD4 cells. The image has a pink and purple filter over it.