If you received proton radiation only, you should feel fairly normal. You should experience little to no radiation sickness, and if you are employed, you should be able to resume working right away.
Regardless of how well you might feel, you should still give yourself time to recover fully. This is absolutely essential following combination therapy. Your attending physician will also explain any special creams or salves you may need to apply to the skin in the irradiated area and give you any necessary prescriptions.
There aren’t any hard-and-fast rules about what you should or shouldn’t do following treatment. Of course, your doctor will tell you about any precautions associated with treatment of particular organs or types of tumors. Absent any specific instructions, we recommend you eat and do whatever you most enjoy during your recovery.