Formulating a Differential Diagnosis for a Patient

Provide a differential diagnosis for the patient complaining of a runny nose and itchy eyes.

A 28-year-old female comes in complaining of a runny nose and itchy eyes. States runny nose, itchy eyes, and ears felt full approximately nine days ago. Describes nose as runny with clear mucus. Sneezes on and off all day. Her eyes itch so bad she just wants to scratch them out, sometimes feels a tickle in her throat, and her ears feel full and sometimes pop. Last year took Claritin with relief. His tonsils are not enlarged, but his throat is mildly erythematous. Identify at least five possible conditions that may be considered in a differential diagnosis for the patient.