What is Arthritis ? pls help​

Inflammation of one or more joints, causing pain and stiffness that can worsen with age.

Different types of arthritis exist, each with different causes including wear and tear, infections, and underlying diseases.

Symptoms include pain, swelling, reduced range of motion, and stiffness.

Medications, physical therapy, or sometimes surgery helps reduce symptoms and improve quality of life.

Explanation:

a disease causing painful inflammation and stiffness of the joints.

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.