A persistent “fishy” smell from the body is usually a medical issue, not something to be embarrassed into ignoring, and it can sometimes signal an infection or a rare metabolic condition that needs proper evaluation. It is important to see a healthcare professional promptly, especially if the smell is new, strong, or affecting your daily life.

Common medical causes

  • Genital infections and imbalance :
    • Bacterial vaginosis can cause a noticeable fishy vaginal odor, often worse after sex, sometimes with discharge or itching.
* Urinary tract infections or other genital infections may also cause strong, unpleasant smells from urine or genital area.
  • Poor oral or skin hygiene :
    • Gingivitis or dental infections can make breath smell foul or “fishy.”
* Sweat trapped in skin folds, tight clothing, or infrequent washing can mix with bacteria and create strong body odor.

Rare condition: “fish odor syndrome”

  • A rare metabolic disorder called trimethylaminuria (TMAU) makes sweat, breath, urine, and other secretions smell like rotten fish because the body cannot break down a smelly chemical called trimethylamine.
  • The odor can get worse with certain foods (like fish, eggs, beans), hormonal changes (periods, menopause), stress, or heavy sweating.

When to see a doctor urgently

Seek medical care soon if:

  • The fishy smell is new, persistent, or strong and lasts more than a couple of days.
  • You also have pain, burning when you pee, unusual discharge, itching, fever, pelvic or abdominal pain, or feel very unwell.
  • The smell affects your whole body (breath, sweat, urine) and does not change with showering or deodorant, which might suggest trimethylaminuria.

Things you can do now

These steps do not replace a medical visit, but they can help while you arrange one:

  1. Hygiene check
    • Wash daily with mild, unscented soap; gently clean skin folds and genital area (external only) and change into clean, breathable clothes and underwear.
    • Wipe front to back after using the toilet to reduce genital infections.
  1. Food and habits
    • Notice whether the smell worsens after eating fish, eggs, beans, or certain supplements; these can worsen TMAU-related odor.
 * Avoid heavy perfumes directly on the genital area; they can irritate skin and make things worse.
  1. Track your symptoms
    • Note when the smell started, what makes it better or worse, any associated symptoms (pain, discharge, rashes, changes in urine or stool), and whether anyone else has noticed it.
    • Bring this information to your appointment; it helps your clinician narrow down the cause.

Getting proper diagnosis

  • A clinician can examine you, take swabs (for infections like bacterial vaginosis), test urine, and, in suspected TMAU, order specific tests to measure trimethylamine or refer you to a specialist.
  • If trimethylaminuria is diagnosed, management can include dietary changes, mildly acidic soaps, certain antibiotics for short periods, and support for the emotional impact, since the condition can strongly affect self-esteem and social life.

If you share more detail (where the smell comes from, how long it’s been happening, and any other symptoms), a more tailored set of possibilities and next-step suggestions can be sketched out—but medical examination is still essential. Information gathered from public forums or data available on the internet and portrayed here.