How to Use a Posterior Night Splint for Heel and Ankle Pain

If you’ve been prescribed a posterior night splint, your podiatrist is helping you treat common conditions like plantar fasciitis, Achilles tendonitis, or chronic heel pain. These splints work by holding your foot in a flexed position overnight, keeping your plantar fascia and Achilles tendon gently stretched to reduce morning pain and stiffness.

Unlike dorsal splints, which are worn on the top of the foot, posterior night splints fit behind the calf and under the foot, providing strong, consistent support and stretch.

Application Instructions

For best results, follow these step-by-step directions when applying your posterior night splint:

1. Unfasten all straps. Start by releasing the three front straps using the side buckles.

2. Position your foot. While seated, place your foot onto the foot plate with your heel snugly against the back.

3. Secure the foot strap. Insert the buckle until you hear a click. Adjust the Velcro until the strap feels supportive but comfortable.

4. Secure the ankle strap. Repeat the same process as the foot strap.

5. Secure the top leg strap. Fasten using the buckle and adjust for comfort.

6. Adjust the flexion straps. With both hands, unfasten the side flexion straps, then gently adjust them to bring your foot upward into a comfortable, slightly flexed position.

7. Recheck for comfort. Repeat steps as needed until the fit feels supportive but not restrictive.

✔ Tip: The splint should be snug but not tight enough to cause discomfort or restrict circulation.

VIDEO: How to Fit a Night Splint | Restore Foot & Ankle Specialists

Care and Cleaning

To keep your night splint clean and effective:

• Remove the soft liner before washing.

• Hand wash in cold water with mild soap.

• Do not bleach.

• Line dry or towel dry only — avoid direct heat or sunlight.

Safety Notes

• The posterior night splint is not designed for walking. Always remove it before getting out of bed or moving around.

• Do not overtighten. Straps should be supportive, not restrictive.

• If you notice increased swelling, pain, numbness, or skin irritation, stop using the splint and contact your podiatrist immediately.

• Remember: this splint is a support device—it does not prevent new injuries or guarantee against recurrence.

Why Posterior Night Splints Are Effective

Research has shown that night splints are one of the most effective conservative treatments for plantar fasciitis and Achilles tendonitis. By holding the foot in a dorsiflexed position overnight, they prevent the plantar fascia from contracting while you sleep. This reduces the sharp “first-step” pain many patients feel in the morning and promotes long-term healing.

Compared to dorsal splints, posterior splints tend to provide a stronger stretch and more rigid support. However, they are bulkier, which can make them less comfortable for some patients to sleep in. Your podiatrist will recommend the type of splint that best suits your needs.

The Bottom Line

A posterior night splint is a proven treatment option for heel and tendon pain, but it must be worn correctly to be effective. Always follow your podiatrist’s instructions, check the fit carefully, and monitor your foot for any irritation or discomfort.

✅ At Restore Foot & Ankle Specialists, we’ll help you get the most out of your night splint—whether dorsal or posterior—and make sure you’re on the right path to recovery. If you’re struggling with plantar fasciitis or Achilles tendon pain, please contact our office today with Dr. Gireesh Reddy or Dr. Sirisha Pokala by calling (469) 573-3427 or by booking an appointment online