A weak positive blood test for mycoplasma indicates infection with mycoplasma. Mycoplasma includes Mycoplasma pneumoniae and Ureaplasma urealyticum, which cause different symptoms after infection. Infection with Mycoplasma pneumoniae will cause mycoplasma pneumonia, leading to cough, expectoration, fever and other symptoms; Ureaplasma urealyticum infection can cause urethritis, leading to local swelling and pain. Mycoplasma infection can not be cured by using ordinary antibiotics. It needs to be treated with azithromycin under the guidance of doctors, which is helpful for the recovery of mycoplasma. During the treatment of mycoplasma, it is necessary to strengthen diet and nutrition, exercise properly, and pay attention to adequate sleep, not staying up late.