Trigeminal Neuralgia: This condition is characterized by sudden, severe, and shock-like pain around the eyes, lips, or nose mainly because of abnormal blood vessels pressing on the trigeminal nerve in the head. It's a common cause of facial pain and has a distinct presentation that often leads to its consideration as a primary diagnosis.

Tension Headache: Often presents with pain that can radiate to the face, typically described as a band or a squeezing sensation around the forehead, and can be associated with facial muscle tension.
Dental Problems: Issues such as toothaches, abscesses, or gum disease can cause significant facial pain, often localized to the area of the dental issue.
Sinusitis: Inflammation of the sinuses can cause pain in the face, particularly in the areas surrounding the eyes and nose, due to the location of the sinuses.
Temporomandibular Joint (TMJ) Disorder: Pain in the jaw joint and surrounding muscles can cause facial pain, especially when chewing or talking.

Acute Angle-Closure Glaucoma: A medical emergency that can cause severe eye and facial pain, blurred vision, and nausea. It requires immediate treatment to prevent vision loss.
Cavernous Sinus Thrombosis: A rare but potentially life-threatening condition that can cause facial pain, especially if accompanied by symptoms like fever, ptosis, or ophthalmoplegia.
Lymphoma or Other Malignancies: Though rare, facial pain can be a presenting symptom of various cancers, including lymphoma, especially if there are other systemic symptoms like weight loss or fever.

Cluster Headache: A rare type of headache disorder known for its extremely painful headaches that occur in cycles or clusters, often on one side of the head, and can be accompanied by facial sweating or nasal congestion.
Glossopharyngeal Neuralgia: Similar to trigeminal neuralgia but involves the glossopharyngeal nerve, causing pain in the throat, tongue, or ear.
Occipital Neuralgia: Involves the occipital nerves and can cause pain in the back and top of the head, sometimes radiating to the face.
Herpes Zoster (Shingles): Can cause facial pain if the trigeminal nerve is affected, leading to a condition known as herpes zoster ophthalmicus, which requires prompt antiviral treatment to prevent complications.