Is it possible that despite the characteristic symptoms, the test for ringworm came out negative?

If you mean ringworm of intimate places - perhaps these symptoms are not related to ringworm, but e.g. another venereal disease. In the first place, it is worth expanding the diagnostics. For example, you can do a home test for venereal diseases: https://www.gdziepolek.pl/produkty/106026/test-na-infekcje-intymne-panelowy-diather-test/apteki https://www.gdziepolek.pl/produkty/112550/test-t1-szybki-test-antygenowy-na-trichomonas-vaginalis-rzesistka-pochwowego-te/apteki More here: https://www.gdziepolek.pl/kategorie/testy-na-choroby-weneryczne Test results should be discussed with your doctor. I also encourage you to read the content of this material: https://www.gdziepolek.pl/kategorie/choroby-weneryczne-przenoszone-droga-plciowa