Sole of the foot (plantar): Understand and specifically treat complaints

Anatomy and biomechanics of the sole of the foot

The plantar side of the foot is a complex network of skin, fat pads, connective tissue, tendons, muscles, nerves and vessels. The plantar fascia is central - a strong connective tissue strand from the undersurface of the heel bone (calcaneus) to the metatarsophalangeal joints of the toes. It tensions the longitudinal arch and acts like a cable pull construction (windlass mechanism) for stability when pushing off.

• Skin & fat pads: protect against pressure and shear forces, especially in the heel and forefoot areas
• Plantar fascia: central band structure for arch support
• Short foot muscles: control toes and fine balance
• Tendons of the lower leg muscles: e.g. B. Tibialis posterior, flexors – relevant players in foot statics
• Nerves: medial and lateral plantar nerves and their branches (including Baxter nerve) for sensitivity and motor skills
• Vessels: Supply via plantar arteries and veins

With every step, the plantar fascia is stretched, especially in the stance and push-off phases. Overload, unusual training, unsuitable footwear or changes in foot statics can lead to micro-irritation, inflammation and pain.

Typical complaints of the plantar side

• Stabbing heel pain, often starting with the first step in the morning (start-up pain)
• Pressure pain on the sole of the foot under the heel or in the ball of the foot (metatarsal area)
• Pulling or burning pain along the plantar fascia
• Stress-dependent pain when standing, walking or running for long periods of time
• Feeling of “stone in the shoe” (especially with nodular changes)
• Numbness or radiating into the foot (possible nerve involvement)

Common diseases of the sole of the foot – overview

Most plantar complaints are caused by functional overload and can be easily treated conservatively. Some clinical pictures are particularly common:

• Plantar fasciitis / heel spur: Irritation of the plantar fascia attachment to the heel; The “heel spur” is an accompanying bony finding, not the cause of the pain.
• Ledderhose's disease (plantar fibromatosis): nodular connective tissue thickenings in the plantar aponeurosis; palpable, sometimes tender nodules.
• Fat pad atrophy of the heel: thinning of the natural heel cushion; leads to pressure and shock-related pain.
• Baxter neuralgia (entrapment of the inferior calcaneal nerve): nerve irritation with stabbing heel pain, often dependent on stress.
• Partial tears/overstretching of the plantar fascia: acute after a misstep or chronic from overuse.
• Plantar overload in the forefoot (metatarsalgia): pain-related protective posture and incorrect loading can increase the pressure under the metatarsal heads.

Detailed information on selected clinical pictures can be found on the subpages linked below.

Causes and risk factors

• Sudden increase in training, lots of downhill or sprinting
• Hard, unyielding footwear or worn cushioning
• Foot shape and axis deviations (e.g. arched arched foot, hollow foot)
• Shortening of the calf muscles/plantar side, limited ankle dorsiflexion
• Being overweight and standing for long periods of time at work
• Metabolic and connective tissue factors (e.g. diabetes, smoking) - especially if healing is delayed
• Previous operations, scars or trauma in the heel/sole area

Diagnostics in orthopedic practice

It is important to differentiate from differential diagnoses such as nerve entrapment (Baxter neuralgia), stress fracture of the heel bone, systemic inflammation or rare tumors. The therapy then depends on the cause, severity and individual goals.

Conservative therapy – step-by-step plan with a sense of proportion

Conservative measures are the priority and lead to significant improvement in most patients. We rely on a structured step-by-step plan, adapted to the findings and everyday life.

Operations are rarely necessary and are only considered after conservative options have been exhausted and there is a clear indication. We advise you individually and without time pressure.

Regenerative processes: when does it make sense?

Regenerative approaches such as PRP (platelet-rich plasma) or autologous blood products can be considered for treatment-resistant, clearly diagnosed irritants. The data situation is heterogeneous; Benefits are possible in selected cases, but there are no guarantees. We discuss the indication, procedure, expected effects and alternatives individually.

• PRP injection: The aim is to modulate the healing response to the plantar fascia.
• Autologous blood/needling procedure: stimulation for tissue regeneration, used evidence-consciously and cautiously.
• No measure replaces consistent basic therapy (load control, exercise program, shoe/insole concept).

Prevention and everyday tips

• Increase training slowly and plan recovery days.
• Integrate calf and plantar stretches into your routine (briefly every day, but regularly).
• Choose shoes with sufficient cushioning and appropriate drop; Replace worn footwear in a timely manner.
• Support weight management in everyday life - every kilo is relieved.
• Start on soft ground; Be very careful when changing your running style (e.g. more forefoot running).
• Incorporate micro-breaks for standing jobs and use insoles/soft bedding.

When should you seek medical advice?

• Acute, severe pain after a misstep/bang (suspected crack or fracture).
• Persistent symptoms despite taking independent measures for 4-6 weeks.
• Numbness, tingling, burning pain with radiation (indication of nerve involvement).
• Redness, swelling, overheating, fever (suspected infection).
• Known underlying diseases (e.g. diabetes) and wounds that heal poorly.
• Pain in growing children/adolescents with exercise limitation.

Further topics on the sole of the foot (undersides)

• Plantar fasciitis / heel spurs: background, tests, evidence-based therapies - from stretching programs to ESWT.
• Ledderhose disease: recognition of plantar nodes, conservative options and indications for surgery.
• Fat pad atrophy of the heel: diagnostics, insole and cushioning concepts, activity management.

Depending on the complaint, related topics are also relevant - e.g. B. Forefoot (plantar plate, metatarsalgia) or hindfoot/ankle. Use the overview in the foot area.

Orthopedic care in Hamburg-Winterhude

We take the time for a careful diagnosis, explain the causes in an understandable way and plan a treatment path that is suitable for everyday use together - conservatively first. Our practice is located at Dorotheenstraße 48, 22301 Hamburg. You can easily request appointments online via Doctolib or by email.