Understanding Heel Pain: Clinical Insights into Plantar Fasciitis, Heel Spurs, and Achilles Tendinitis 

In our latest educational video, young track athlete and future physical therapist Eliška Klepková demonstrates how to actively use COMPEX SP series devices to relieve tension, manage pain, and accelerate tissue regeneration directly at home.

1. Plantar Fasciitis: The Core Mechanical Failure 

The most common culprit behind localized heel pain is Plantar Fasciitis. This condition involves micro-tearing and degenerative changes (often progressing from acute inflammation to chronic fasciosis) of the plantar fascia—the thick, dense band of connective tissue running across the bottom of your foot, connecting the calcaneus (heel bone) to the base of your toes.

Biomedically, the plantar fascia acts exactly like a bowstring, maintaining the structural integrity of the medial longitudinal arch of the foot. When you walk, run, or jump, this structure undergoes massive tensile stress, distributing load across the entire foot and functioning as a natural, dynamic shock absorber. When overtaxed by poor biomechanics, sudden volume increases, or inadequate footwear, the fascia develops micro-tears at its attachment point, leading to that classic, sharp pain during your first steps in the morning.

2. Calcaneal Spurs (Heel Spurs): The Body's Response to Chronic Traction 

A heel spur is a bony outgrowth (osteophyte) developing on the underside of the calcaneus. It is important to note a common misconception: the spur itself is rarely the primary source of pain. Instead, it is a secondary symptom of chronic, long-term traction and stress placed upon the surrounding soft tissues and fascia.

When the plantaris tendon or fascia is constantly overloaded, the body attempts to reinforce the area by depositing calcium at the attachment site. This calcification forms the spur, which is a clear indicator that the kinetic chain of the lower leg has been neglected or mismanaged for an extended period.

3. Achilles Tendinitis: The Power-Transfer Under Strain 

Another frequent driver of posterior heel pain is Achilles Tendinitis—the inflammation or degeneration of the strongest and thickest tendon in the human body. The Achilles tendon connects the triceps surae (the calf muscles: gastrocnemius and soleus) directly to the calcaneus, transferring the mechanical force necessary for plantarflexion, pushing off during a stride, and standing on your tiptoes.

From a physiological standpoint, the Achilles tendon has a highly vulnerable "critical zone" located approximately 2 to 6 centimeters above its insertion into the heel bone. This specific area suffers from a poor vascular blood supply (hypovascularity). Because oxygenated blood and nutrient delivery are naturally limited in this zone, micro-traumas heal incredibly slowly, making it highly susceptible to chronic tendinopathy, severe inflammation, or even spontaneous rupture if ignored.

How Compex SP Technology Targets and Accelerates Healing 

When dealing with these dense, low-vascular connective tissues, passive rest is rarely enough. This is where advanced Electromyostimulation (EMS) and TENS technology from Compex become an indispensable asset to your rehabilitation strategy:

• Pain Modulation (TENS): By applying specific localized frequencies over the pain site, your Compex device blocks nociceptive (pain) signals traveling to the brain via the gate control mechanism, providing immediate, drug-free relief.

• Hyper-Vascularization (Capillarisation Program): Since both the plantar fascia and the Achilles tendon suffer from limited blood flow, utilizing the Capillarisation program forces an intense increase in microcirculation. This floods the damaged, ischemic tissues with oxygenated blood, crucial proteins, and healing nutrients to speed up cellular matrix repair.

• Deactivating Myofascial Trigger Points (Relaxation & Overwork Programs): Often, heel pain is exacerbated by excessive tightness in the calf muscles. By using Compex on the gastrocnemius and soleus, you can rapidly decrease muscle hypertonicity and reduce the constant mechanical pull on the heel bone.

Listen to your body. Heel injuries are notorious for lingering for months if you try to push through them. Watch Eliška's practical video guide below to learn the exact electrode placements and parameters to get your recovery back on track.