Strong positive ovulation day and night or strong positive, may be related to the failure of the test paper, pregnancy and other reasons, women can change the test paper, medical examination and other ways to clarify the cause. 1. Test strip failure: If the woman’s test method is inaccurate, reagent failure or urine contamination may lead to a strong positive situation, you should choose to replace the test strip and retest, the test should be to avoid urine contamination. 2. Pregnancy: If a woman is pregnant, her progesterone level will increase, which may also cause this kind of situation. It is best to go to the regular hospital for gynecological ultrasound examination and blood test for chorionic gonadotropin level, and after diagnosis of early pregnancy, she should rest assured to nourish the fetus and undergo regular maternity checkups. In addition, when a woman has polycystic ovary syndrome, hormone level disorders, etc., may also cause this situation, it is recommended to consult a doctor for examination, to identify the cause of the disease and then carry out targeted treatment.