When a joint or organ in the body is irritated, it can reflect on to the nerves and irritate them. The nerves can also be irritated by over stretching. The irritation to the nerves can either speed up or slow down the message that the nerve is transmitting. This then alters the message to the brain or the organ. As a result of this the organ or joint may not work properly or the brain may interpret the condition of the joint or organ etc improperly

Abnormal nervous system function.