Fever of 100.2. Sinus congestion &pressure. Spitting up very thick sticky white and yellow sinus mucus. What causes this? Is this normal? Sinusitis?

Viral infection. Symptoms are typical of any number of viral upper respiratory infections. These are almost always normal symptoms and not a cause for alarm. They can last on average from 7 to 14 days. Treatment is symptomatic and can include decongestants, saline rinses and time. .