A cyst 55mm x 48mm in the left adnexa carries certain risks, such as secondary infection, rupture of the cyst, torsion of the tip, etc., but they cannot be generalized. 1. Secondary infection: mostly secondary to cyst rupture or torsion, mainly manifested as fever and abdominal pain. 2. Rupture of cysts: the scope of cysts is relatively large at present, which may lead to the rupture of cysts when they are stimulated by heavy blows and other stimuli. Patients will have obvious abdominal pain. 3. Tibial torsion: when torsion occurs, the patient will suddenly experience severe pain in the lower abdomen, which may be accompanied by nausea, vomiting or even shock. In some patients with left adnexal cyst 55mmx 48mm, the cyst may shrink on its own or remain unchanged, which is usually not dangerous and does not need special treatment, and can be followed up regularly. If you find a left adnexal cyst of 55mmx 48mm, you should go to the gynecology department of the hospital for examination and treatment under the advice of the doctor to avoid adverse effects.