Are there different types of neuralgia?

There are three main types of Neuralgia:

Trigeminal neuralgia, or Tic Douloureux, ( also known as prosopalgia )

This is a neuropathic disorder of the trigeminal nerve that causes episodes of intense pain in the eyes, lips, nose, scalp, forehead, and jaw. Trigeminal neuralgia is considered by many to be among the most painful of conditions and has been labeled the suicide disease, due to the significant numbers of people taking their own lives because they were unable to have their pain controlled with medications or surgery. An estimated one in 15,000 people suffers from trigeminal neuralgia, although numbers may be significantly higher due to frequent misdiagnosis. It usually develops after the age of 40, although there have been cases with patients being as young as three years of age.

Signs of TN can be seen in males who may deliberately miss an area of their face when shaving, in order to avoid triggering an episode. Although trigeminal neuralgia is not fatal, successive recurrences may be incapacitating, and the fear of provoking an attack may make sufferers reluctant to engage in normal activities.

Postherpetic neuralgia

Not all of those diagnosed with shingles go on to experience postherpetic neuralgia, which can be more painful than shingles. The pain and sensitivity can last for months or even years. The pain is usually in the form of an intolerable sensitivity to any touch but especially light touch. Postherpetic neuralgia is not restricted to the face; it can occur anywhere on the body but usually occurs at the location of the shingles rash.

Depression is not uncommon due to the pain and social isolation during the illness. Treatment for postherpetic neuralgia is the same as for other forms.

Atypical (trigeminal) neuralgia

The symptoms of atypical neuralgia (ATN) tend to be vague and misleading. This may be the most misdiagnosed form of neuralgia. The symptoms can be mistaken for migraines, dental problems such as TMJ, musculoskeletal issues, and hypochondriasis. This form of neuralgia is extremely rare, thus also contributing to the misdiagnosis. ATN can have a wide range of symptoms and the pain can fluctuate in intensity from mild aching to a crushing or burning sensation, and also to the extreme pain experienced with the more common trigeminal neuralgia.

The pain from ATN is usually less than that of trigeminal neuralgia, but is nearly continuous and periods of remission are rare. This form can also cause pain in the back of the scalp and neck.
Many attempts have been made to link ATN with psychological issues, though modern studies have shown no link.

Theories have suggested that infections of the teeth or sinuses, vascular compression, physical trauma, or past viral infections could be a cause. Evidence thus far seems to be anecdotal. Another interesting aspect is that this form affects men and women equally, unlike the trigeminal neuralgia, which is much more common in women than men.
ATN is also known as Atypical Facial Pain (ATP) or Persistent Idiopathic Facial Pain (PIFP).