When we talk about the facial pain we should have to focus our attention over the pain sensitive structures. These possible sources of pain on the face may be from the teeth, gums, sinuses, temporomandibular joints, jaws and eyes. Any disorder or disease of these structures may cause the pain on face.
Facial pain is also caused by specific neurological disorders. These are trigeminal neuralgia, trigeminal nerve lesions, post herpetic neuralgia, cluster headaches (migranous neuralgia, Horton’s neuralgia), atypical facial pain (most probably considered to be somatic equivalent of depression), giant cell arteritis (cranial arteritis, temporal arteritis), tension headache and migraine.
Some times myofascial pain syndrome of neck shoulder and face muscles may mimic the other disorders of pain on the face. Ear and temporal mandibular joint pain may be due to due to the myofascial pain syndrome of lateral pterygoid, masseter (deep), sternocleidomastoid, Medial pterygoid. Eye or eye brow pain may be due to sternocleidomastoid (sternal), temporalis splenius cervicis, masseter (superficial), sub occipital group, occipitalis, orbicularis occuli, trapezius. Cheek and jaw pain may be due to sternocleidomastoid, masseter (superficial), lateral pterygoid, trapezius, masseter (deep), digastric, medial pterygoid, platysma, orbicularis occuli, zygomaticus major. Tooth ache may be due to the temporalis, masseter (superficial), digastric, frontal head ache may be due the sternocleidomastoid, semispinalis capitalis, frontalis, and zygomaticus major.
So when an appropriate cause is identified, a suitable management plan is made to treat the concerned disorder.