Hi, and thanks for your medical question on eHealth forum!
Tumors of the oral cavity, pyorrhea or pus in gums and Vitamin C deficiency can cause bleeding from mouth. Underlying infection or inflammation (as in arthritis, IBS etc) in the body can result in the feeling of heat. Another possibility is hyperthyroidism. Antibiotic or other drug metabolism can also cause a feeling of heat in the body. Drink plenty of fluids, eat lots of fruits and vegetables and take multivitamins. Get your thyroid function assessed. Sjogrenâs syndrome is another possibility. It can also be due to heart problems, especially if you feel suffocated at night.
Since a confirmed diagnosis cannot be given on net please consult your PCP regarding this. Hope this helps. Take care!