For upper body joints like hands, wrists, and elbows, use 2 grams of Voltaren gel per application. For lower body joints like knees, ankles, and feet, use 4 grams. You apply it four times a day, and the total across all treated joints should never exceed 32 grams daily.
Upper Body vs. Lower Body Doses
The amount of gel you need depends on which joint you’re treating. Upper body joints (hands, wrists, elbows) require a smaller dose of 2 grams per application, which works out to a line of gel about 2.25 inches long. Lower body joints (knees, ankles, feet) need twice that: 4 grams per application, or a 4.5-inch line of gel.
Each tube comes with a dosing card that has marked lines for both measurements. Squeeze the gel directly onto the card to match the correct length, then use your hand to spread it over the affected area. If you’ve lost the card, a 2.25-inch line is roughly the length of a AA battery, while 4.5 inches is about the width of a standard index card.
How Often to Apply
The recommended frequency is four times a day for both upper and lower body joints. That means each upper body joint gets up to 8 grams total per day (2 grams × 4 applications), and each lower body joint gets up to 16 grams per day (4 grams × 4 applications).
If you’re treating more than one joint, the math matters. The absolute daily ceiling is 32 grams across all joints combined. So if you’re treating both knees (16 grams each), you’d already be at the maximum and shouldn’t apply gel to additional joints. If you’re treating one knee and one hand, you’d use 16 grams plus 8 grams for a total of 24 grams, which stays within the limit.
How to Measure Without the Dosing Card
The dosing card is the most reliable way to get the right amount. Lay it flat, squeeze the gel along the marked line for your joint type, then scoop the gel off the card and rub it evenly over the skin surrounding the joint. Spread it gently rather than rubbing it in aggressively. Don’t apply it to open wounds, broken skin, or areas with rashes.
After applying, wash your hands unless your hands are the area being treated. If you are treating your hands, wait at least 10 minutes before washing them so the gel has time to absorb.
Where Voltaren Gel Works Best
Voltaren gel is designed for joints close to the skin’s surface. It works well on hands, wrists, elbows, knees, ankles, and feet because the active ingredient can penetrate the relatively thin tissue over these joints. Deeper joints like hips and the spine are surrounded by thick layers of muscle and tissue, which limits how much of the medication actually reaches the joint. The gel is not intended for those areas.
Protect Treated Skin From the Sun
Voltaren gel can make treated skin more sensitive to sunlight. While you’re using it, keep the treated area covered or shielded from direct sun exposure, especially between 10 a.m. and 3 p.m. Avoid tanning beds entirely. This sensitivity lasts as long as you’re applying the gel regularly.
After applying, avoid covering the area with tight bandages or wraps. Loose clothing is fine once the gel has dried. Don’t apply it immediately before or after a shower, as wet skin can alter absorption. Let the area dry naturally before getting dressed.
Don’t Combine It With Other NSAIDs
Voltaren gel contains diclofenac, which belongs to the same family of pain relievers as ibuprofen (Advil) and naproxen (Aleve). Even though the gel is applied to the skin, some of the medication enters your bloodstream. Using it alongside oral NSAIDs increases the risk of stomach ulcers, nausea, and gastrointestinal bleeding.
This includes over-the-counter products you might not think of as NSAIDs. Many combination cold, headache, and menstrual pain products contain ibuprofen, naproxen, or aspirin. Check the active ingredients on anything you’re taking while using Voltaren gel. Acetaminophen (Tylenol) is a different type of pain reliever and is generally not in the same risk category.
What to Expect Over Time
Voltaren gel is not an instant fix. Some people notice mild relief within the first few days, but the full effect builds over one to two weeks of consistent use, four times daily. If you skip applications or use less than the recommended amount, it takes longer to reach effective levels in the joint tissue. Consistency matters more than the amount of any single application. Stick with the dosing schedule even on days when pain feels manageable, as the gel works partly by keeping inflammation suppressed over time rather than treating individual flare-ups.