The research method was a randomised controlled trial with a pre-test, post-test, and follow-up design and a control group. A total number of 60 patients with chronic headaches were selected according to convenience sampling and randomly divided into experimental and control groups (n = 30 per group). The results showed that training based on the therapeutic approach of self-healing had a significant effect on pain-related anxiety and the severity of perceived pain dimension among the participants in the experimental group in the post-test and follow-up phases (p < 0.001). The self-healing training (the healing codes) could be used as a treatment approach to hold relatively stable effects to decrease the frequency of migraine headaches in healthcare centres and psychological services.