What are the signs of AIDS?

Quick Answer

AIDS is the most advanced stage of HIV infection, defined by a severely damaged immune system and the appearance of certain opportunistic infections or cancers. Signs include rapid weight loss, recurring fever, extreme fatigue, prolonged swelling of lymph nodes, and infections like pneumonia or thrush. Without treatment, HIV typically progresses to AIDS in 8–10 years, but modern antiretroviral therapy can stop this progression and make the virus undetectable.

AIDS is diagnosed when CD4 count drops below 200 cells/mm³ or an opportunistic infection occurs.
Common early signs include persistent fever, night sweats, and unintentional weight loss.
Chronic diarrhea lasting more than one month can be a sign of AIDS.
Recurring pneumonia, tuberculosis, or oral thrush may indicate advanced HIV.
People with AIDS often have swollen lymph nodes in the neck, armpit, or groin that last for weeks.
Without treatment, HIV progresses to AIDS in an average of 8–10 years in the U.S.

Symptom Breakdown by Infection

HIV (human immunodeficiency virus) is a retrovirus that attacks the immune system’s CD4 cells. With effective antiretroviral therapy (ART), the virus can be suppressed to undetectable levels, meaning it cannot be transmitted (U=U) and the immune system stays intact. AIDS (acquired immunodeficiency syndrome) is the final stage of an untreated HIV infection, when the immune system is severely damaged and the body becomes vulnerable to certain infections and cancers. Knowing the signs of AIDS can help people seek testing and treatment early, long before the immune system collapses.

Infection	Classic signs
Chlamydia	Usually none. When present: watery discharge, burning urination, testicular ache, bleeding between periods.
Gonorrhea	Yellow-green discharge, painful urination, rectal itching; throat infections rarely announce themselves.
Syphilis	A painless round sore (chancre), then palm/sole rash, fever, and swollen nodes in stage two.
HIV	Half get acute flu-like illness 2–4 weeks in: fever, sore throat, rash, night sweats.
Genital herpes (HSV)	Tingling then clusters of small blisters that crust over; first outbreak is the worst.
HPV (human papillomavirus)	Usually invisible. Some strains cause warts; high-risk types stay silent until screening finds changes.
Trichomoniasis	Frothy yellow-green discharge with strong odor (women); most men notice only mild irritation.
Hepatitis B	Fatigue, dark urine, jaundice, right-upper abdominal pain when symptomatic.
Hepatitis C	Mostly silent for years; fatigue and brain fog may be the only hints until liver damage advances.

When Symptoms Point Somewhere Else

Urinary burning can come from bladder infections rather than STIs, genital itching from yeast or dermatitis, and pelvic pain from non-sexual causes. That overlap is precisely why guessing fails and testing wins: the same discharge pattern can mean three different conditions requiring three different treatments.

Frequently Asked Questions

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Sources & Further Reading

Figures reflect CDC surveillance and WHO estimates; they are population statistics, not personal risk predictions.