physical education. n. (Education) training and practice in sports, gymnastics, etc, as in schools and colleges. Abbreviation: PE. physâ²ical educaâ²tion. n. instruction in sports, exercise, and hygiene, esp. as part of a school or college program.
3. Stress/injury. Stress on the tissues or any type of injury in the mouth can cause canker sores. Since the sores are actually tiny ulcers, they can be caused by any kind of hard brushing or eating something that can cause bruises or lead to tissue inflammation in the mouth.
Bleeding gums Bone or joint pain: This pain is caused by the buildup of leukemia cells near the surface of the bone or inside the joint. Swelling of the abdomen (belly): Leukemia cells can collect in the liver and spleen, making them bigger.