Bacterial infections, viral infections, and fungal infections are just different infection pathogenic microorganisms. Common pathogenic microorganisms in nature mainly include bacteria, viruses, fungi, mycoplasma, chlamydia, rickettsia, etc. Fungal infections are the third most common infection pathogens after bacterial infections and viral infections. In nature, the most common fungi mainly include Candida spp. and Aspergillus spp. The most abundant genus of Candida is Candida albicans, and there are other non-Candida albicans, including Candida tropicalis and Candida smoothus. Aspergillus is also more common in nature, including Aspergillus flavus, Aspergillus fumigatus, Aspergillus terreus, etc. Fungal infections and bacterial infections are both infections, but fungal infections are often secondary to low host immunity, large amounts of broad-spectrum antibiotic use, as well as large amounts of hormones, hypotension in the course of the patient’s original diabetes, and a particularly high number of medical measures, often in combination with fungal infections.