Whether having sex once every two days will lead to kidney deficiency needs to be decided according to their age, physical state, etc. If they are older and in poor physical state, etc., it will cause kidney deficiency after a long time. Healthy young people have sex once every two days is generally normal. However, it should be noted that, after sex, pay attention to rest, do not exertion, generally will not appear the performance of kidney deficiency. However, if you are in the middle-aged and old age stage, two days of sexual life is a high frequency, the body may appear kidney deficiency performance. Patients with kidney deficiency may show symptoms such as premature aging of face, forgetfulness, lumbar and knee soreness (the feeling of soreness and weakness in the waist and knees), fatigue, reduced sexual function, and poor mood. If you have symptoms of kidney deficiency, it is recommended to abstain from sex and seek medical advice promptly.