Ear, nose and throat specialist Ear, nose and throat specialist Haidy Marzouk, MD Haidy Marzouk, MD, explains which symptoms may indicate a common cold and which may suggest seasonal allergies -- plus, what symptoms may accompany a sinus infection. The Upstate otolaryngologist also tells how allergy testing is conducted, and how some patients can be desensitized., explains which symptoms may indicate a common cold and which may suggest seasonal allergies -- plus, what symptoms may accompany a sinus infection. The Upstate otolaryngologist also tells how allergy testing is conducted, and how some patients can be desensitized.