Symptoms of calcium deficiency in young men include the following: first, mental symptoms, there can be anxiety, depression and sleepiness and other mental symptoms. Second, the performance of nails and skin, there can be dry skin, scales and nails become brittle, hair becomes rough and other performance. Thirdly, facial nerve manifestations, when the facial nerve of the face when the buckle can have the corner of the eye and the corner of the mouth twitching, this is a typical facial nerve kowtow. Fourth, sensory abnormalities, hypocalcemia can lead to numbness of the tongue, hands and feet, and there can be tingling symptoms. Fifth, hand and foot convulsions, hand and foot severe hypocalcemia can lead to hand and foot convulsions, laryngeal spasm, can induce epileptic seizures, this time, we should be early examination, early calcium treatment, in order to avoid life-threatening as well as sequelae.