How to Use a Foot Spa

A foot spa is a small electrical appliance that you fill with water and put your feet in. That one sentence explains why it deserves a little more care than most relaxation products. Used sensibly, it is a pleasant addition to an evening routine. This guide walks through set-up, temperature, additives, the session itself and cleaning, and explains clearly who should get advice before using one.

Why water and electricity need respect

Electrical Safety First explains that your body conducts electricity more easily in wet conditions, which increases the risk and severity of electric shock. It also advises against using extension leads to power appliances in a bathroom. The practical conclusions for a foot spa are simple: use it in a dry room, plug it directly into a wall socket, keep the plug and socket dry, and only ever handle the plug with dry hands.

Electrical Safety First also recommends RCD protection, which helps protect you from electric shock if a product is faulty. If your home’s consumer unit does not have one, it suggests using an RCD plug on the socket where the product is plugged in.

Read the manual first

Models differ in ways that matter: some heat water from cold, many only maintain the temperature of warm water you add; maximum fill levels vary; and rules on additives vary. Follow your manual wherever it differs from general advice.

Check the unit

The Health and Safety Executive notes that most electrical safety defects can be found by visual examination, and that looking for signs of damage is a good way of maintaining portable equipment. Before each use, check the cable, the plug and the basin for cracks, splits or scorch marks. Do not use a damaged unit.

Setting up, step by step

1. Place the empty, unplugged spa on a dry, level floor in front of a stable chair, close enough to a wall socket that the cable is not stretched, and positioned so nobody will trip on it.
2. Fill it while it is unplugged. Carry water to the spa in a jug. Fill only to the marked level, allowing for the water your feet will displace.
3. Use the temperature range the manufacturer states. Test the water with your wrist or elbow before your feet go in. It should feel comfortably warm, not hot.
4. Dry your hands, then plug in and switch on.
5. Sit down before you put your feet in. Never stand in a foot spa.

Additives

Do not add salts, oils, bubble bath or foaming products unless your manual explicitly allows them. Additives may damage some units or make the surface slippery. If your model does allow essential oils, our aromatherapy guide covers how to use them safely.

During the session

• Follow the session length in your manual, and use the timer if there is one.
• Stay awake and stay seated.
• If the water feels too hot at any point, take your feet out.
• Keep phones and other plugged-in devices away from the water.
• If the unit has massage rollers, move your feet gently over them while seated. Do not press down with your body weight.

Afterwards

1. Switch off and unplug with dry hands before you do anything else.
2. Dry your feet thoroughly and put on slippers or socks before you stand, as wet feet on a hard floor are a slip risk.
3. Empty the spa, rinse it, and clean and dry it as the manual directs, including any removable rollers or filters. Never immerse the whole unit.

Full cleaning guidance is in how to clean massage equipment safely.

Who should get advice first

People with diabetes need particular care. Diabetes UK explains that people living with diabetes are much more likely to develop problems with their feet, and that problems can get worse quickly, especially if the feeling in the feet has changed. Its foot-care advice is to always check water temperature with your wrist or elbow, and to avoid soaking your feet, because soaking makes the skin more likely to get damaged. That is difficult to reconcile with using a foot spa, so speak to your healthcare team or a podiatrist first.

The same applies if you have reduced feeling in your feet for any reason, circulation problems, significant swelling, or any wound, broken skin or infection on your feet or lower legs. Reduced sensation means you may not notice water that is too hot.

Do not use a foot spa, and seek medical advice, if one leg is newly swollen, painful or discoloured. Our calf self-massage guide sets out the warning signs of a blood clot.

Stop if you feel dizzy, uncomfortable or unwell.

Foot spa or hands?

A foot spa provides warmth and a reason to sit still for a while. It is not the only option. Our guide to foot self-massage compares it with using your hands or a soft ball, and our article on warm baths and hydrotherapy looks at the evidence on warm water and relaxation. A foot soak also slots neatly into a timed evening wind-down routine.

The bottom line

Fill and empty it unplugged. Use a dry room, a wall socket and dry hands. Test the temperature with your wrist or elbow. Add nothing the manual does not allow. Stay seated and awake. Clean and dry it after every use. If you have diabetes, reduced sensation, circulation problems or broken skin on your feet, get advice before you use one.

Sources

• Electrical Safety First, “Staying safe in your bathroom”
• Health and Safety Executive, “Portable appliance testing FAQs”
• Diabetes UK, “How to look after your feet”

Last reviewed: 19 September 2026. This article is general information about everyday relaxation and is not medical advice.