If your 9-month-old daughter seems to have conjunctivitis, you should consult a doctor. Symptoms of bacterial conjunctivitis may include purulent discharge, crusted eyelids in the morning, redness of the white part of the eye, and irritation. Treatment with antibiotic eye drops like Polysporin is recommended for a week. Warm compresses and gentle cleaning can also help relieve discomfort. If there is no improvement after a few days or if the condition worsens, seek medical advice promptly.