Another sinus infection...?

Dear Nicky,

The last couple nights you've been sleeping just great.  As a matter of fact I had to wake you up this morning so you could get ready for school.  But your nose, man, it just keeps running with thick, green snot.  It won't stop.  Is it another sinus infection?  Do you need antibiotics again?  I wish there were more we could do, but what is it?

Love,

Dad