Chronic sinusitis is a condition that occurs when the sinuses, which are the air-filled spaces in the skull, become inflamed and blocked...

Delayed drug eruption is a type of allergic reaction to a medication that occurs days or weeks after the medication is taken. It is a...

Latex allergy is a type of allergic reaction that occurs when the body's immune system mistakenly identifies latex as a harmful substance...

Shellfish allergy is a type of food allergy that occurs when the body's immune system mistakenly identifies shellfish as a harmful...