Adnexal thickening is a clinical manifestation in which the doctor finds a thicker adnexal area when he or she performs a double or triple diagnosis on a patient, with individual patients having pressure pain. The causes of adnexal thickening include inflammation of the adnexa and hydrosalpinx. The treatment of adnexal thickening needs to be analyzed on a case-by-case basis, based on the patient’s age, whether she has the desire to have children and her symptoms. If the patient’s symptoms are not obvious and she does not experience discomfort in daily life, she only needs to continue to observe; if the patient is accompanied by pain and other symptoms that are more obvious, she needs to consider whether there is inflammation and carry out anti-inflammatory treatment accordingly, and if necessary, surgery can be carried out.