Itchy thighs are not necessarily a symptom of AIDS, and fungal infections, eczema, and other skin conditions may need to be ruled out. In fact, the symptoms of AIDS are not clearly specific, and you cannot infer or suspect the presence of AIDS through the symptoms. AIDS is usually contracted through unprotected sex, or through tattooing or other irregular practices, or through mother-to-child transmission. It is not possible to get infected through ordinary life contact. Therefore, if you have had high-risk behavior and are worried about HIV, you need to take an HIV antibody test four weeks after the high-risk behavior. If the test result is negative, it can basically be ruled out; if the test result is positive, it is necessary to further confirm the diagnosis.