FACIAL PALSY AND BELL’S PALSY  both are facial palsy.
Facial paralysis, an inability to move the muscles of the face on one or both sides it occurs in 7^th cranial nerve, also known as the facial paralysis. Injury to the facial nerve may affect several aspects of the face depending on the degree and location of facial nerve injury.

Facial palsy can be cause by: 
Trigeminal neuralgia

Temporomandibular joint dysfunction
• Temporomandibular pain, which relates to the Temporomandibular joint (TMJ) and the muscles of the jaw.
• Trigeminal neuralgia- a condition characterized by pain coming from the trigeminal nerve, which affects the face — most commonly one side of the jaw or cheek.

Symptoms:
• Unilateral facial pain
• Orofacial pain 

Bell’s Palsy
Sudden weakness in the muscle, The most common symptom of Bell’s palsy is a sudden onset of paralysis on one side of the face, which is often associated with ear pain.
• Facial weakness
• Drooling
• Temporomandibular disorder
• Compromised movement of jaw joint and surrounding muscle
• Oral pain
• Facial pain