The Medicine Buddha is the Buddha of healing.
Historically, it is believed helpful to meditate on his image and to chant his mantra with the desire to alleviate suffering and attain enlightenment. It is thought that Dr. Mikao Usui, the originator of Reiki in its modern form, may have meditated on the Buddhist sutra of the Healing Buddha as part of his efforts to rediscover the original healing practices of the Buddha.
The Medicine Buddha is an enlightened being who has unbiased compassion for all
living beings. He protects living beings from physical and mental illnesses and other
dangers and obstacles, and helps them to eradicate the three poisons-attachment, hatred,
and ignorance-which are the source of all sickness and danger. He is the “Buddha
Doctor.”