Side effects of five-day radiation for prostate cancer

The treatment is often a highly focused form of external-beam radiotherapy. Side effects differ with the treated area, prostate size, existing urinary or bowel problems, other treatment and the individual dose plan.

Urinary effects can include needing to pass urine more often or urgently, a weaker stream, waking at night, or burning when urinating. Bowel irritation may cause looser or more frequent stools, wind, rectal discomfort or a small amount of bleeding. Fatigue can build after the treatment visits rather than appearing immediately.

Irritation often settles gradually after treatment, although some effects can persist or appear months later. Erection difficulties may develop over time. Rare late problems include ongoing rectal bleeding, urinary narrowing, blood in the urine or changes to bladder control.

Follow the radiotherapy team's instructions about bladder filling, diet and medicines. Drink enough fluid unless another clinician has restricted it, limit drinks that worsen urgency, and keep gentle activity in your day to help with energy. Do not start anti-inflammatory, urinary or bowel medicines without checking that they fit your treatment plan.

Record urinary frequency, bowel changes, pain and bleeding so the team can see the pattern. Tell them early if symptoms disrupt sleep or daily activity; prescription medicines and adjustments to food or fluid timing may help.

Contact the radiotherapy team the same day if passing urine becomes increasingly difficult, burning is severe, visible blood appears in urine or stool, diarrhoea does not settle, or pain is worsening. The team can assess for treatment irritation, infection, dehydration or urinary blockage.

Seek urgent care if you cannot pass urine, develop heavy bleeding or clots, feel faint, have severe abdominal pain, or cannot keep fluids down. Fever with shaking chills also needs prompt assessment, especially when other cancer treatment may be affecting immunity.

Ask why a five-day schedule suits your cancer, how the prostate will be positioned and tracked, and how to prepare your bladder and bowel for each visit. Clarify which symptoms are expected, whom to call after hours, how follow-up will check treatment response, and how radiotherapy or hormone treatment may affect erections, continence and fertility.