thanks for asking your query
jaw clicking is a disorder which is caused either due to any injury
which cause a strong blow at jaw part
,clenching,grinding and abnormal chewing.
treatment option includes mouth guard as it will protect abnormal grinding
other inexpensive treatment is TMJ
exercise,it will relax the muscles and make it stronger
Close our mouth allowing your tongue to touch your palate
. With your mouth closed, move your tongue back. Now slowly open our mouth until your tongue moves away. Let your mouth be open till a count of ten. This is repeated twice.
consult your dentist
too for more advanced exercises
hope this will help