Sinus Infection (Sinusitis) Symptoms and Treatment Options. Sinus infection (sinusitis) symptoms can include headaches, a sore throat, and toothaches. Chronic sinusitis may be caused by allergies and can last up to three months. Antibiotics and home remedies can relieve sinus infection (sinusitis) symptoms. Read more: Sinus Infection (Sinusitis) Symptoms and Treatment Options.