Balancing the Yin and Yangs

These days, my body seems to tell me that I am "heaty". I am having ulcers in my mouth lately which has not been happening since years ago. Therefore to counter the "heatiness", I eat coconuts and drink the juice. It helps a lot and now all my mouth ulcers have disappeared. It is a matter of balancing the "Yin" and "Yangs"