What Causes Hair Loss with Chemotherapy: Understanding the Link

Written by Our Editorial Team
Last updated

When confronted with a cancer diagnosis, the ensuing treatment, especially chemotherapy, brings about various physical changes. One of the most distressing side effects for many is hair loss, a result of the treatment's effect on the body's rapidly dividing cells. Understanding why hair loss occurs and how to manage it can make this challenging phase more manageable.

What Causes Hair Loss With Chemotherapy?

Chemotherapy drugs are potent medicines designed to attack rapidly growing cancer cells. However, these drugs do not distinguish between cancer cells and other rapidly growing cells in the body, such as those in the hair follicles. As a result, when chemotherapy drugs target these hair cells, it leads to hair loss, known medically as chemotherapy-induced alopecia.

The Extent of Hair Loss During Chemotherapy

Chemotherapy-induced hair loss is not confined to the scalp. It can also affect eyelashes, eyebrows, armpit hair, pubic hair, and other body hair. The extent of hair loss can vary depending on the type of chemotherapy drugs used and their doses, ranging from thinning to complete baldness. However, it's important to remember that most of the time, hair loss from chemotherapy is temporary, with hair regrowth typically beginning three to six months after treatment ends.

Preventing and Managing Hair Loss During Chemotherapy

While no treatment can guarantee that your hair won't fall out during or after chemotherapy, there are strategies to manage hair loss. One such method is the use of scalp cooling caps, which slow blood flow to the scalp and can help reduce hair loss. However, these caps are not effective for everyone and may carry a small risk of cancer recurrence in the scalp. Another method involves using minoxidil, a drug approved for hair loss, though its effectiveness in promoting hair regrowth after chemotherapy is still under research.

Tips to Minimize the Impact of Hair Loss

Managing the emotional and physical impact of hair loss is a significant part of the chemotherapy journey. Here are some tips:

  • Prepare for hair loss: As hair loss is a common side effect of chemotherapy, preparing for this possibility can help. Some patients choose to cut their hair short or shave their heads as a proactive measure.
  • Plan for a head covering: Wigs, scarves, or hats can provide comfort, sun protection, and a sense of control over one's appearance.
  • Be gentle to your hair: Avoid harsh treatments such as coloring, perming, or using heat styling tools, as these can weaken the hair.

Dealing with Hair Regrowth After Chemotherapy

When hair starts to grow back after chemotherapy, it might be different in texture or color initially. Patience is essential during this period, and continuing to avoid harsh hair treatments can help nurture the new growth. Over time, the hair's texture and color will likely return to what it was pre-treatment.


While hair loss during chemotherapy can be a distressing experience, it's important to remember that it's a temporary side effect of a life-saving treatment. Understanding the cause of hair loss and strategies to manage it can help you maintain a sense of control during this challenging period. Reach out to your healthcare provider or a support group for more personalized advice and emotional support.

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