Tonsillitis, or pharyngitis, refers to inflammation of the pharyngeal tonsils, which are lymph glands located in the back of the throat that are visible through the mouth.
Bad breath

Pediatric Sinusitis
Sinusitis in children can look different than sinusitis in adults. Children tend to have a cough, bad breath, low energy, and swelling around the eyes, along with a thick yellow-green post-nasal drip.