How Can We Help My Teenage Son Physically And Mentally When He Attempted Suicide Because He Wants To Increase His Height?

My son is 17 years old. Few days before he attempt to suicide. He take a pesticide and admitted in hospital for two days. Now he is ok. The main reason to suicide is, he want to increase their height. Now his height is 7.7 ft. He want his height 7.10ft. Now he is asking to increase his height by any way/method. He asked that if his height not reached at 7.10 ft he finished his body. Kindly suggest me what is the soulution.