@Spirit-Harmony hi sorry to hear you are having such a difficult time atm. You can get a seroma which is fluid build up in your chest wall. They can drain it if that's the cause of the weeping. They will get to the bottom of it. It's sometimes a process of elimination. No comfort for you trying to find an answer. I suffer from quite a lot of allergies so I have been through all sorts of attempts to control outbreaks or reactions to treatments. I haven't had radiotherapy yet. I am sure they will be able to offer something to help. A last resort for me is prednisolone ( cortisone ) which usually knocks any reaction on the head very quickly. I am not a Doctor and don't know your particular problem but hope this gives you some comfort to know they will get it sorted soon. Take care xx