Medial malleolus

Looks like

The bump on the inside of the ankle — the lower end of the shin bone.

What it does

Forms the inner wall of the ankle joint and anchors the strong inner (deltoid) ligament.

Keeping it well

Breaks in twisting injuries: if you cannot take four steps, or the back edge or tip of the bone is tender, get an X-ray (Ottawa ankle rules).

Related conditions

• Achilles tendon rupture
• Acromegaly
• Chronic venous insufficiency
• Compartment syndrome
• Fractures
• Fragility fracture
• Frailty & falls in older age
• Growing pains
• Hyperparathyroidism
• Lymphangitis
• Lymphatic filariasis (elephantiasis)
• Lymphoedema
• Osgood–Schlatter disease
• Osteogenesis imperfecta (brittle bone disease)
• Osteomalacia & rickets
• Osteomyelitis (bone infection)
• Osteoporosis
• Paget's disease of bone
• Restless legs syndrome
• Sarcoma
• Shin splints (medial tibial stress syndrome)
• Superficial thrombophlebitis
• Varicose veins
• Venomous snakebite
• Vitamin B1, C and other deficiencies
• Vitamin D deficiency