Sugar is a pure substance. It contains only sugar particles. A scoop of sugar made from Canadian sugar beets contains exactly the same kind of particles as a scoop of sugar made from Australian sugar cane. A mixture contains at least two different pure substances, or two different types of particles. pure The Particle Theory of Matter Table 1 cold Principle Illustration substance A substance B hot 2. 3. 4. All matter is made up of tiny particles. All particles of one substance are the same. Different substances are made of different particles.
Foot symptoms that may occur along with foot pain. Pain in the feet may accompany other symptoms affecting any of the structures of the foot including: Bleeding or bruising. Burning or tingling sensation (paresthesia). Difficulty moving the foot, ankle or toes. Joint pain. Numbness. Stiffness. Swelling (edema) of the foot or joints.
Causes of Foot Pain. Pain in the foot can be due to a problem in any part of the foot. Bones, ligaments, tendons, muscles, fascia, toenail beds, nerves, blood vessels, or skin can be the source of foot pain. The cause of foot pain can be narrowed down by location and by considering some of the most common causes of foot pain. Heel Pain. Plantar fasciitis is the most common cause of heel pain. The plantar fascia, a band of tough tissue connecting the heel bone to the toes, becomes irritated or inflamed. Heel pain, worst in the morning when getting out of bed, is the most common symptom. Arch pain may also be present.