The main reason why you need to avoid eating spicy and irritating things, including green pepper, sesame pepper and other chili products, is that spicy and irritating things can easily induce congestion in the nasal mucosa, aggravate nasal blockage, increase nasal exudation and make the symptoms of sinusitis more serious. 2, patients with sinusitis should avoid eating seafood-like things, because seafood-like things, can easily induce patients to have nasal mucosa The thing, easy to produce phlegm on the recovery of sinusitis is also very unfavorable, sinusitis patients are best to light diet, eat more vegetables, fruits.