Managing chemotherapy side effects at home

Infection risk and fever

Chemotherapy reduces the bone marrow’s production of white blood cells, and neutrophils in particular are the cells that fight bacterial infection. When the neutrophil count drops, an infection that would normally be minor can become dangerous quickly. This is why fever after chemotherapy is treated as an emergency rather than something to sleep off.

The count usually falls to its lowest point some days after a cycle and then recovers — your team can tell you roughly when that window falls for your regimen. During it, sensible precautions help: wash hands often and properly, especially before eating and after using the toilet; avoid close contact with people who have a cough, cold, fever or diarrhoea; keep food thoroughly cooked and freshly prepared; wash fruit and vegetables well; drink safe water; and treat any cut or graze promptly.

Keep a working thermometer at home and know how to use it. If you feel shivery or unwell, check your temperature rather than guessing.

Nausea and vomiting

Modern anti-sickness medicines are effective, but they work best taken preventively, on the schedule you were given, rather than only once nausea has started. Take them as prescribed even on days you feel reasonably well, unless your team told you otherwise.

Practical things that often help: eat smaller amounts more often rather than three large meals; choose bland, dry, room-temperature foods when queasy; sip fluids steadily through the day instead of drinking a lot at once; avoid strong cooking smells, and let someone else cook if you can; and sit upright for a while after eating.

Tell your team if the prescribed medicines are not controlling it. There are several classes of anti-sickness drug and the regimen can usually be changed. Persistent vomiting also risks dehydration, which is a reason to call rather than push through.

Mouth and throat care

Some regimens cause soreness, ulcers or a changed sense of taste. A gentle routine, started from day one rather than after problems appear, makes a real difference.

Brush with a soft brush after meals and at bedtime; rinse with a mild salt or bicarbonate mouthwash if your team recommends it; avoid alcohol-based mouthwashes, very hot food and spicy or sharp-edged foods; and keep lips moisturised. Tell your team about ulcers, white patches, or pain that stops you eating or drinking — these need assessment rather than home management alone, and can be a sign of infection.

Bowel changes

Both diarrhoea and constipation are common, sometimes in the same cycle, and can come from the chemotherapy itself or from supportive medicines such as anti-sickness drugs and strong painkillers.

For diarrhoea, replace fluids steadily and tell your team early — do not start anti-diarrhoeal medicines on your own, because some causes need different treatment. For constipation, fluids, gentle movement and a fibre approach your team agrees with usually help; ask before using laxatives. Report severe abdominal pain, a swollen abdomen, or diarrhoea with fever or blood without delay.

Fatigue

Cancer-related fatigue is not ordinary tiredness and it does not always improve with sleep. It is one of the most common effects of treatment and one of the most under-reported.

What helps for most people is pacing rather than either pushing through or stopping entirely: plan the important activity of the day for when your energy is usually best, break tasks into shorter blocks, accept practical help with cooking and errands, and keep some gentle activity such as short walks where you are able — complete rest tends to make deconditioning worse. Tell your team if fatigue is worsening sharply, since treatable causes such as anaemia, thyroid problems or low mood can contribute.

Eating and drinking

Appetite often falls and taste often changes. Weight loss during treatment matters, so the goal in a difficult week is usually calories and protein in whatever form you can manage, not a perfect diet.

Eat when you feel like it rather than by the clock; keep easy foods within reach; try cold or room-temperature foods if smells are difficult; use plastic cutlery if you notice a metallic taste; and keep fluid intake steady through the day. If you have kidney disease as well as cancer, fluid and diet advice must come from your own team — general advice can conflict with a renal prescription, and your nephrologist and oncologist should be aware of each other’s plans.

Ask before taking any supplement, herbal product or traditional medicine. Some interact with chemotherapy drugs or affect liver enzymes, and “natural” does not mean inert.

Skin, hair and nails

Skin can become dry or more sensitive to sunlight; nails may change colour or become brittle; hair loss depends entirely on the drugs used and is not universal. Use a gentle unperfumed moisturiser, protect skin from strong sun, avoid very hot water, and keep nails short and clean. Report any new rash, blistering, or skin breakdown to your team rather than treating it yourself.

Keep a simple symptom diary

A few lines a day is enough: temperature if you took it, what you ate and drank, how many times you were sick or opened your bowels, how tired you felt out of ten, and any new symptom with the date it started.

This is the single most useful thing you can bring to the next appointment. It turns “I felt bad last week” into information the team can act on — and it is often what leads to a dose adjustment or an extra supportive medicine that makes the following cycle noticeably easier.