Radiation Treatment: What It Is and What to Expect
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor provides Radiation Treatment?
A doctor called a radiation oncologist usually plans and oversees radiation treatment. Your regular doctor may refer you to this specialist if radiation might help you. A direct primary care or concierge doctor can be a first stop for an evaluation and can refer you to a specialist when needed.
What it is
Radiation treatment uses high-energy rays or particles to damage cells that grow too fast, such as cancer cells. The goal is to shrink or destroy a tumor. Normal cells can be affected too, but they usually repair themselves better.
Why a doctor might recommend it
Doctors often use radiation to treat cancer, alone or with surgery and chemotherapy. It may be given before surgery to shrink a tumor, or afterward to lower the chance that cancer returns. Radiation can also ease symptoms, such as pain, when a cure is not possible.
How to prepare
Before treatment starts, you will have a planning visit called a simulation. The team may mark your skin so the beams land in the same spot each time. Common items include:
- A list of all medicines and supplements you take.
- Questions about how many treatments you will need.
- Comfortable clothing, since you may change into a gown.
- A ride home if you might feel tired.
What happens during it
Most external radiation works like getting an X-ray. You lie still on a table while a machine moves around you. The session often lasts only a few minutes. You will not feel the radiation.
Recovery
Many people keep up most normal activities, though tiredness is common. Skin in the treated area may get red or sore, like a sunburn. Side effects usually improve in the weeks after treatment ends.
Risks and side effects
Side effects depend on the body part treated and include tiredness, skin changes, and upset stomach. Some effects can appear months or years later. Your radiation oncologist will review the risks that apply to you before you start.
Who performs it
A radiation oncologist leads the care and writes the treatment plan. Radiation therapists operate the machines, and a medical physicist checks that the equipment delivers the right amount.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance, while a concierge doctor usually charges more and often works alongside insurance. Either one can be a steady partner during cancer care, managing everyday needs, coordinating appointments, and answering questions between oncology visits. They do not deliver radiation themselves, so they will refer you to a radiation oncologist and can handle follow-up care afterward.
Common questions
Will the treatment hurt?
No. The radiation itself is painless, like getting an X-ray. Some people develop soreness in the treated area later, which the care team can help manage.
Will I be radioactive?
Not with external beam radiation, which is the most common type. You can safely be around family, including children. Some internal treatments do call for short precautions, and your team will explain any needed.
Can I keep working?
Many people do, especially early in the course. Fatigue often grows over time, so some people cut back their hours. Your energy level will guide what works for you.
How long does a course last?
It varies widely by the type and goal of treatment. Some courses last a few visits, while others run for several weeks. Your radiation oncologist will give you a schedule.
Sources
Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
