The causes of high HCG but no pregnancy mainly include biochemical pregnancy, staphyloma, chorioepithelial cell carcinoma, teratoma, etc., which need to be treated according to different causes. 1. biochemical pregnancy: biochemical pregnancy can cause an increase in HCG, but there is no gestational sac in the uterine cavity, followed by vaginal bleeding for a period of time, and HCG will return to normal; 2. staphyloma: it is a benign gestational trophoblastic disease, and the HCG value can be significantly higher than the corresponding value at the normal gestational period. HCG value can be significantly higher than the corresponding value at normal gestational age, and most of them can be cured by treatment of uterus removal; 3. chorionic epithelial cell carcinoma: it is a rare malignant tumor, mainly seen in women under 35 years old, the tumor secretes HCG causing elevated test value, and the common symptom is continuous irregular vaginal bleeding, and the development of the disease can be controlled by chemotherapy and total hysterectomy; 4. teratoma: the HCG value The dynamic change of HCG value is consistent with the improvement and deterioration of the disease, and the mild increase of HCG value indicates the residual or recurrence of cancer tumor. In addition, gastric cancer, pancreatic cancer, lung cancer, colon cancer, liver cancer, ovarian cancer, digestive system carcinoid tumor, etc. may also cause HCG elevation, so you need to go to the hospital to improve the relevant examination with the signs and symptoms to make a clear diagnosis and then treat the cause.