OBJECTIVE: To discover the uncommon complication of pott's puffy in a patient with chronic sinusitis. Clinical case: male patient of 59 years old, consulted by a tumor in front of 8 months of development of progressive growth painless, without inflammation, there are added 2 months inflammatory signs, fever, purulent rhinorrhea, and headache, in consultation to our service. Physical examination: tumor with inflammatory signs of about 4 cm in diameter, oscillating, not painful as the throbbing, pus scarce in the right nasal cavity. Takes place with surgical drainage and endoscopic lynch entry. Patient with good development today. CONCLUSION: Early diagnosis and timely treatment are still the best therapeutic tools, causing a decrease in the incidence of complications such as Pott's Puffy tumor.