Morton’s Neuroma: Symptoms, Causes, and Relief for Foot Pain

Morton’s neuroma is a painful condition that affects the ball of your foot, most commonly the area between the third and fourth toes. Despite its name, it is not a tumour. Instead, it is a benign thickening of the protective tissue (fleshy sheath) surrounding one of the digital nerves leading to the toes.

In the UK, this condition is a frequent cause of metatarsalgia (generalised ball-of-foot pain). It often develops when the nerve is compressed or irritated over a long period. This irritation leads to inflammation and scarring, which eventually thickens the nerve tissue. Because the space between the long bones of the foot (metatarsals) is narrow, even slight swelling can cause significant discomfort, particularly when walking or wearing tight-fitting shoes.

The symptoms of Morton’s neuroma usually come on gradually. You might notice them only when wearing certain shoes or engaging in high-impact activities. Unlike many other foot conditions, there is rarely a visible sign on the outside of the foot—such as a lump or redness—though the internal sensation can be intense.

Common symptoms include:

• Burning Pain: A sharp, burning ache in the ball of the foot that may radiate into the toes.
• The 'Pebble' Sensation: A common description is feeling as though you are standing on a folded-up sock, a stone, or a pebble inside your shoe.
• Numbness and Tingling: You may experience 'pins and needles' or a loss of sensation in the affected toes.
• Worsening with Movement: The pain usually intensifies when walking or when the forefoot is squeezed by narrow footwear.

Symptoms often improve temporarily if you take your shoes off, stop walking, or massage the area.

Anything that causes compression or irritation of the nerve can contribute to the development of Morton’s neuroma. Understanding these factors is the first step toward effective management.

Key contributors include:

• Footwear Choices: High-heeled shoes or shoes with narrow, tapered toe boxes are the most common culprits. These styles force the toes into a cramped position and shift weight onto the ball of the foot.
• Foot Structure: People with certain foot shapes, such as high arches, flat feet, or bunions (hallux valgus), may have increased pressure on the metatarsal heads, leading to nerve irritation.
• High-Impact Activities: Sports that involve repetitive trauma to the feet, such as running, jumping, or racquet sports, can aggravate the nerve.
• Occupational Factors: Jobs that require long periods of standing or crouching can put sustained pressure on the forefoot.

Many cases of Morton’s neuroma can be managed successfully at home without the need for surgery. The primary goal is to reduce pressure on the nerve.

Effective self-care strategies include:

• Review Footwear: Switch to shoes with a wide toe box that allows your toes to splay naturally. Avoid heels higher than 2cm.
• Metatarsal Pads: These are small cushions available at pharmacies that sit inside your shoe to help lift and separate the metatarsal heads, taking pressure off the nerve.
• Activity Modification: While the foot is inflamed, try to substitute high-impact exercise with low-impact alternatives like swimming or cycling.
• Pain Relief: Over-the-counter anti-inflammatories like ibuprofen can help reduce swelling and dull the pain. Always consult a pharmacist before starting new medication.
• Weight Management: Reducing excess weight can decrease the load placed on the forefoot with every step.

If self-care measures do not provide relief after a few weeks, it is important to seek professional medical advice. A GP can help confirm the diagnosis, often by performing a physical exam known as 'Mulder’s Click'—where the foot is squeezed to see if a click or pain is reproduced.

You should book a consultation if:

• The pain is severe enough to interfere with your daily activities or work.
• Home treatments, such as changing footwear and using pads, have not helped.
• You have persistent numbness or tingling that is spreading.
• The pain is worsening despite rest.

A GP can provide a referral for imaging, such as an ultrasound or MRI scan, to rule out other conditions like stress fractures or bursitis. They may also refer you to a podiatrist or an orthopaedic specialist for advanced treatments like steroid injections or, in rare cases, surgical neurectomy.

In line with NICE (National Institute for Health and Care Excellence) guidance, treatment for Morton's neuroma in the UK typically follows a stepped approach starting with the least invasive methods.

1. Podiatry and Orthotics: A podiatrist can provide custom-made insoles (orthotics) designed to correct your foot mechanics and permanently offload the affected nerve.

2. Steroid Injections: If pain persists, a corticosteroid mixed with local anaesthetic can be injected around the nerve to reduce inflammation and provide significant, though sometimes temporary, relief.

3. Sclerosant Injections: Some clinics offer alcohol injections to dampen the nerve's pain signals, though this is less common than steroid treatments.

4. Surgery: If all conservative measures fail, surgery may be considered. This involve removing either the thickened nerve tissue or the surrounding ligament to create more space. While usually successful, surgery carries risks of permanent numbness in the toes.