Purpura can cause fever, purpura is caused by allergy, infection and other factors, infection is a very important factor in the incidence of purpura, it can be bacterial, fungal or viral infection, usually cause fever can reach 38.5 degrees or more, so it is very important to actively deal with the primary causative factors. For purpura caused by bacterial infection, it needs to be treated with static doses of sodium penicillin, clindamycin phosphate injection, and levofloxacin hydrochloride injection. For purpura caused by viral infection, oral administration of vaxilovir hydrochloride granules or famciclovir granules is needed for treatment. For purpura caused by fungus, you can take Itraconazole capsule or terbinafine hydrochloride tablet orally for treatment. The fever can be treated with ibuprofen dry suspension to lower the temperature symptomatically and drink more water.