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Most of us who are living with HIV can't point to the moment we got it. We can point to a bad flu we shrugged off. A rash we blamed on laundry detergent. A month of night sweats we told ourselves was stress. Then years of feeling completely normal — because HIV, without treatment, hides in the body for a long time before it starts breaking things.

The symptoms of HIV depend on which stage of the virus we're in. This page walks through all three — using the CDC's clinical staging and the words we actually use with each other. If you're reading this because you're worried about a recent exposure, jump to When to test.

The short version: most people have flu-like symptoms 2–4 weeks after HIV enters the body, then feel fine for years, then — without treatment — gradually get sicker as the immune system weakens. On effective treatment, none of that happens.

The three stages of HIV

The CDC groups HIV infection into three clinical stages: acute infection (the first few weeks), chronic infection (which can last a decade or longer without treatment), and Stage 3, which is AIDS.1 Antiretroviral therapy stops the progression cold — most people on effective ART never see stages 2 or 3.

Stage 1 — Acute HIV infection

Stage 1 · 2 to 4 weeks after exposure

The flu that isn't the flu

Within 2 to 4 weeks of infection, most of us develop a flu-like illness the CDC calls acute retroviral syndrome. It's the immune system meeting HIV for the first time. Symptoms come on fast, last a few days to a few weeks, and then go away — leaving us to blame it on the flu, food poisoning, or a bad hangover.2

Most common signs and symptoms:

Fever
A deep, unusual tiredness
Swollen lymph nodes (glands in the neck, armpits, groin)
Sore throat, sometimes swollen tonsils
Joint and muscle aches
Diarrhea
A rash — often on the chest or back — that comes and goes
Night sweats
Mouth ulcers

Some people never have acute symptoms at all. The CDC notes that these symptoms feel just like other common viral infections — flu, mono, a bad cold — which is why most acute HIV infections get missed.2

Why acute HIV matters: During acute infection, our viral load is extraordinarily high and we're most infectious to others. If you think you might be in acute HIV, get a NAT (nucleic acid test) — it can detect HIV as early as 10–33 days after exposure, well before antibody tests turn positive.3

Stage 2 — The long quiet

Stage 2 · Months to 10+ years without treatment

Chronic HIV infection (clinical latency)

After acute HIV, most of us feel completely fine — sometimes for a decade or more. The virus is still replicating, still slowly damaging our immune system, but we don't feel it. This is the stage where a lot of people find out they're HIV-positive by accident: a routine physical, a blood donation, an insurance screening, a partner's diagnosis. Without treatment, this stage lasts roughly 10 years on average before advancing to Stage 3.1

What we might notice, if anything:

Persistent swollen lymph nodes that don't quite go away
Occasional low-grade fevers
Fatigue that outlasts a good night's sleep
Yeast infections in the mouth (thrush) or, for women, recurrent vaginal yeast
Weight loss without trying
Skin problems — folliculitis, seborrheic dermatitis, shingles at a younger-than-usual age

None of these are specific to HIV. All of them can be nothing. But if we have multiple, or they keep coming back, an HIV test is worth it.

On treatment, this stage lasts our whole lives. People living with HIV who are consistently on ART and virally suppressed don't progress to Stage 3, and their life expectancy is comparable to people who don't have HIV.4

Stage 3 — Advanced HIV (AIDS)

Stage 3 · CD4 below 200 or an AIDS-defining illness

Late-stage HIV

Without treatment, HIV eventually breaks down the immune system to the point where opportunistic infections take hold. The CDC defines Stage 3 (AIDS) as CD4 count below 200 cells/mm³ or the presence of an AIDS-defining condition, regardless of CD4 count.1

Signs and symptoms of advanced HIV:

Rapid weight loss (formerly called "wasting")
Recurring fevers or profuse night sweats that don't stop
Extreme, unexplained tiredness
Prolonged swollen lymph nodes
Chronic diarrhea lasting more than a week
White patches on the tongue, mouth, or throat (thrush)
Pneumonia — particularly PJP (pneumocystis pneumonia)
Red, brown, pink, or purplish blotches on or under the skin (Kaposi sarcoma)
Memory loss, depression, and neurological symptoms

These symptoms are what HIV looked like in the 1980s and 1990s, and they're what HIV still looks like when people don't have access to treatment.5

Even at Stage 3, treatment works. A late diagnosis is not a death sentence. Starting antiretroviral therapy — even with a very low CD4 count — restores immune function over months, and most people recover completely with time.

What we wish we'd known about symptoms

Some of us look back on the acute phase and can pinpoint it exactly — the "worst flu of my life." Others don't remember anything unusual at all. Both are normal. A few things we wish someone had told us:

Your body doesn't hide it forever, but it can hide it for a long time. Someone who feels fine can still be living with HIV and passing it on. This is why routine testing matters — it's not a moral judgment, it's just how the virus works.
An HIV symptom checklist is not a diagnosis. Every symptom on this page is also on the symptom list for dozens of other illnesses. Only a test tells us. Googling symptoms at 2 a.m. gives us panic, not answers.
Late-stage HIV is a treatment access problem, not a virology problem. The reason people in the U.S. still show up with AIDS-defining illnesses is that they didn't have access to testing, care, or medications — not that the medications don't work.
Symptoms after starting treatment usually settle down. The first few weeks on ART can bring some side effects — nausea, headaches, sleep changes. Most fade within a month. If they don't, we tell our provider — regimens can be switched.

I had the acute HIV flu and blamed it on a Miami sunburn and cheap rum. Six years later I found out what it really was. I'm still angry no one asked me about it. I'm alive because someone finally did. — composite reflection from PLWH community

When to get tested

If we think we might have been exposed to HIV, we don't wait for symptoms. Symptoms lie — they show up in fewer than half of people, they mimic every other virus in the world, and by the time chronic-stage symptoms appear, HIV has been in our body for years. A test is the only answer.3

I had a possible exposure yesterday. Should I test today?

No test can detect HIV that fast. But if it was within the last 72 hours, we can start PEP (post-exposure prophylaxis) today — it can prevent HIV from taking hold. Go to an ER, urgent care, or Ryan White clinic and ask for PEP.

How long after exposure until a test can catch HIV?

Depends on the test. A NAT can detect HIV 10 to 33 days after exposure. An antigen/antibody lab test, 18 to 45 days. A rapid antibody or self-test, 23 to 90 days.3

I feel fine. Do I still need to test?

Yes. Most of the years of untreated HIV are years when people feel fine. The CDC recommends everyone aged 13–64 get tested at least once, and people with ongoing risk factors test more often.6

Full details on test types and where to find them are on our HIV Testing page.

If you're supporting someone

If someone you love is worried they might have HIV — showing symptoms, or just anxious after an exposure — the most useful things you can do are usually the smallest:

Don't diagnose them. Don't reassure them ("you don't have HIV, don't be dramatic"). Both feel like dismissal.
Offer to go with them to get tested. Waiting rooms are lonely.
If they test positive, remember: this is not a death sentence, it's a chronic condition. Treatment works. They will be okay. Tell them that.
Don't tell anyone else without their permission. Ever.

Florida testing entry points: Free HIV testing is available at every county health department in Florida, at Ryan White clinics statewide, and at LGBTQ+ community health centers like Compass (Palm Beach), Metro Wellness (Tampa Bay), and Empower U (Miami). Or call the FL HIV/AIDS Hotline at 1-800-352-2437.

HIV Testing Newly Diagnosed Understanding Your Labs Treatment Prevention

References & Sources

Sources for HIV clinical staging, acute and chronic symptoms, and testing windows.

CDC — About HIV (Stages of HIV Infection). CDC clinical staging of HIV: acute, chronic, and Stage 3 (AIDS). ↩ ↩ ↩
CDC — Patient Information Sheet: Acute HIV Infection (PDF). CDC's patient handout on acute retroviral syndrome symptoms. ↩ ↩
CDC — Getting Tested for HIV (Test Types & Window Periods). CDC guidance on the three HIV test types and each test's window period. ↩ ↩ ↩
HHS — Adult and Adolescent ARV Guidelines (When to Start). Federal treatment guidelines documenting near-normal life expectancy on effective ART. ↩
HHS — Guidelines for the Prevention and Treatment of Opportunistic Infections in Adults with HIV. Federal guidelines on AIDS-defining conditions and opportunistic infections. ↩
CDC — HIV Screening and Testing Recommendations. CDC recommendation that everyone 13–64 be tested at least once as part of routine health care. ↩