If the disc displaces and does not reduce (move back into position) this may be associated with locking. Clicking alone is not diagnostic of TMD since it is present in high proportion of the general population, mostly in people who have no pain. Crepitus often indicates arthritic changes in the joint, and may occur at any time during mandibular movement, especially lateral movements. Perforation of the disc may also cause crepitus. Due to the proximity of the TMJ to the ear canal, joint noises are perceived to be much louder to the individual than to others. Often people with TMD are surprised that what sounds to them like very loud noises cannot be heard at all by others next to them. However, it is occasionally possible for loud joint noises to be easily heard by others in some cases and this can be a source of embarrassment e.g. when eating in company. Pain
Pain symptoms in TMD can be thought of as originating from the joint (arthralgia), or from the muscles (myofascial), or both. There is a poor correlation between TMD pain severity and evidence of tissue pathology.Generally, degenerative joint changes are associated with greater pain. Myofascial pain
Pain originating from the muscles of mastication as a result of abnormal muscular function or hyperactivity. The muscular pain is frequently, but not always, associated with daytime clenching or nocturnal bruxism. Limitation of mandibular movement
The jaw deviates to the affected side during opening, and restricted mouth opening usually signifies that both TMJs are involved, but severe trismus rarely occurs.
Livedoid vasculopathy  is a chronic cutaneous disease seen predominantly in young to middle-aged women. One acronym used to describe its features is "Painful purpuric ulcers with reticular pattern of the lower extremities" (PURPLE). It can be divided into a primary (or idiopathic) form and a secondary form, which has been associated with a number of diseases, including chronic venous hypertension and varicosities. : 343

See also
List of cutaneous conditions
Livedo
Livedo reticularis
Livedoid dermatitis

References
External links

DermNet vascular/livedoid-vasculitis