Eczema and AIDS are two different diseases, the difference between them is the different causes of the disease, different symptoms, different prognosis and so on. 1. Difference in etiology: eczema is an inflammation of the superficial dermis and epidermis caused by a variety of internal and external factors. AIDS is an infectious disease caused by human immunodeficiency virus infection. 2. Symptomatic difference: eczema affected areas of skin infiltration, redness and swelling, surface roughness, dark red or with hyperpigmentation, lesions limited rash or plaque, mostly symmetrical distribution, itching symptoms. Early AIDS rash is due to HIV infection after the immune system is impaired, the skin appeared an acute reaction, the whole body can appear, mostly distributed, itching symptoms are not obvious. 3. Prognostic difference: eczema has a good prognosis and generally does not affect life expectancy. HIV infection is a lifelong disease and cannot be cured yet. If you want to distinguish between AIDS and eczema, you have to go to the hospital and undergo an examination before you can make a clear diagnosis. You can not judge on your own, so as not to delay the condition.