When you hear the word “radiotherapy,” one of the first images that might come to mind is hair loss. It’s a common concern, and for good reason. But the relationship between radiotherapy and hair loss isn’t as straightforward as you might think. Whether or not you lose your hair depends entirely on one key factor: the area of your body being treated.
Radiotherapy is a localized treatment, meaning it only affects the specific area where the radiation beams are directed. Your hair follicles are sensitive to radiation, so if your treatment is targeting a part of the body with hair, loss in that area is a very likely side effect. Let’s look at what this means in practice.
When Hair Loss is Likely to Happen
If you are receiving radiotherapy to your head, you will almost certainly experience hair loss on your scalp. This includes treatments for brain tumors, skull-based tumors, or certain head and neck cancers. Similarly, if radiation is directed at other hairy areas, like the chest, underarms, or pelvic region, you can expect hair loss in those specific spots. The important thing to remember is that you will only lose hair in the precise area being treated.
What to Expect During Treatment
Hair loss from radiotherapy doesn’t usually happen overnight. It typically begins two to three weeks after your first session. You might first notice your hair feeling drier or more brittle before it starts to shed. The amount of hair loss is also tied to the radiation dose; a higher dose increases the likelihood that the hair loss will be permanent. For many people receiving lower doses, their hair does grow back, though the texture or color might be different when it returns.
Caring for Your Scalp and Hair
Taking gentle care of your hair and scalp during treatment can make a big difference. Use a mild, fragrance-free shampoo and avoid harsh chemicals or dyes. When washing, use lukewarm water and pat your scalp dry with a soft towel instead of rubbing. Many people find it comfortable to wear a soft cap or a scarf, especially at night or in cooler temperatures, to protect the sensitive skin on their head.
Will My Hair Grow Back?
This is one of the biggest questions, and the answer brings hope for many. Hair often begins to regrow three to six months after your treatment has finished. The regrowth process can be slow, and the new hair might be finer, curlier, or a different shade than before. While there’s no guaranteed way to speed up regrowth, maintaining a healthy diet and keeping your scalp moisturized can support the process.
Facing the possibility of hair loss can be emotionally challenging, but knowing what to expect can help you feel more prepared. Remember, your medical team is your best resource. They can give you detailed information based on your specific treatment plan and connect you with support resources to help you through this aspect of your journey.