Understanding the Side Effects of Chemotherapy and Radiotherapy

Beyond the physical changes, hair loss carries significant psychological weight, affecting self-esteem and body image. Patients often manage these emotions by using wigs or scarves, or by proactively shaving their hair to regain a sense of control over their appearance.

Chemotherapy-Induced Skin and Nail Changes

Because chemotherapy affects cells throughout the body, the skin and nails often show visible signs of treatment side effects.

Dermatological Changes

Patients frequently report various skin issues, which are typically temporary but can be uncomfortable:

• Irritation and Sensitivity: This includes dryness, itching, flakiness, rashes, and general sensitivity. Management often involves using fragrance-free moisturizers and avoiding hot water.
• Pigmentation Issues: Changes in skin color can occur, specifically hyperpigmentation (the appearance of dark patches) or hypopigmentation (the appearance of light patches).
• Acne-like Breakouts: It is common to see breakouts that resemble acne on the face, chest, or back.
• Redness: Skin may become red, similar to a sunburn, which may sometimes be treated with topical hydrocortisone.
• Photosensitivity: Chemotherapy can increase the skin's sensitivity to UV light, significantly raising the risk of sunburn. Patients are advised to use high-SPF broad-spectrum sunscreen and protective clothing.

Nail Changes

The nail beds are also susceptible to damage, which can result in brittleness, discoloration, or the development of ridges. Additionally, these changes can lead to an increased risk of nail infections.

Radiotherapy Side Effects

Unlike the systemic nature of chemotherapy, radiotherapy side effects are localized to the specific area of the body receiving the radiation beams.

Localized Hair Loss

Hair loss from radiotherapy occurs specifically in the area being treated or where the radiation beams pass through the body (for example, the opposite side of the head or neck). While hair often grows back, the radiation can cause hair follicle damage that results in permanent changes. These changes may include alterations to the hair's texture, color, or thickness (such as hair becoming finer or thinner).

In rare and more serious cases, high-dose radiation or repeated treatments can lead to scarring alopecia, a condition where the hair follicles are permanently destroyed due to scarring.

Localized Skin Impacts

The skin within the radiation field often experiences direct irritation, which can include:

• Scalp irritation: Characterized by redness, tenderness, and itching.

💡 Exam Tip: Systemic vs. Localized

When distinguishing between these two treatments in a clinical or exam setting, remember that chemotherapy is a systemic treatment that can affect any rapidly dividing cell in the entire body (leading to widespread side effects), whereas radiotherapy is a localized treatment where side effects are generally confined to the area receiving the radiation dose.