What could cause or relieve pinna ear spasms (sharp pain)?

Let me explain: Numerous conditions and problems can cause outer ear pain. According to the university of illinois medical center, ear pain can range from mild to severe, and is usually caused by conditions of the outer or middle ear. Otitis externa(external ear infection). Ear truma ear canal blockage(wax). The treatment is according to cause.

Auricular Neuralgia: Based on your description you are experiencing neuralgic type pain. Neuralgia is caused by irritation or nerve damage from systemic disease, inflammation, infection, and compression or physical trauma to a nerve. As you can see from the diagram there are several branches of diff. Origin including the cervical plexus, 2nd cervical nerve, and inferior maxillary nerve. Please see ENT for eval.