There should be no major drainage after healing unless they radiate you. Radiation cuts off those natural drain paths and causes what ENT's refer to as "WOODY" or "PITHY" neck tissue. It feels somewhat firm and when you have a cold or stuffy nose your throat swells up like a croaking frog.
Darrell

Stage 3, T3,N1,M0,SCC, Base of Tongue. No Surgery, Radiationx39, Chemo, Taxol & Carboplatin Weekly 8 Treatments 2004. Age 60. Recurrence 2/06, SCC, Chest & Neck (Sub clavean), Remission 8/06. Recurrence SCC 12/10/06 Chest.