Temporomandibular Joint (TMJ) Disorder: This condition is characterized by pain in the jaw, face, and surrounding areas, which can also lead to ear pain and pressure due to the proximity of the TMJ to the ear. The symptoms of eye strain or feeling like the eyes are lagging could be related to referred pain or tension headaches associated with TMJ disorders.

Tension Headache: Often presents with bilateral pressure or pain but can be unilateral, including pain in the jaw and ear areas. Eye strain or feeling like the eyes are lagging can be part of the headache experience.
Sinusitis: Although more commonly associated with facial pain and pressure, sinusitis can cause referred pain to the ears and jaw, especially if the maxillary sinuses are involved. Eye symptoms could be due to sinus pressure.
Ear Infection (Otitis Media or Otitis Externa): Can cause ear pain and pressure, and if the infection spreads or is severe, could lead to referred pain in the jaw. Eye symptoms might be less directly related but could occur due to overall discomfort or associated conditions like sinusitis.
Dental Issues (e.g., Tooth Abscess, Impacted Wisdom Tooth): Dental problems can cause localized pain that might radiate to the ear and jaw, potentially causing tension that leads to eye strain.

Stroke or Transient Ischemic Attack (TIA): Although less common in young adults, a stroke or TIA can present with sudden onset of unusual symptoms, including unilateral facial or eye symptoms. It's crucial to rule out these conditions due to their severe consequences.
Multiple Sclerosis: This autoimmune disease can cause a wide range of neurological symptoms, including vision problems, pain, and pressure in various parts of the body, including the face and head.
Giant Cell Arteritis: More common in older adults but can occur in younger individuals, this condition involves inflammation of the blood vessels and can cause severe headaches, jaw claudication, and visual disturbances.
Trigeminal Neuralgia: A chronic pain condition that affects the trigeminal nerve, which can cause intense pain in parts of the face, including the jaw and areas around the eyes and ears.

Ramsay Hunt Syndrome Type 2: Caused by the varicella-zoster virus, this condition can lead to facial paralysis, ear pain, and sometimes eye symptoms due to the involvement of the facial nerve.
Eagle Syndrome: Involves an elongated styloid process or calcified stylohyoid ligament, which can cause facial, ear, and throat pain, potentially radiating to the jaw and causing eye discomfort due to the anatomical proximity.
Cervicogenic Headache: Originates from the cervical spine and can cause pain on one side of the head, including the eye and ear, due to referred pain patterns from the neck.