(Hallux Abducto Valgus—HAV)
This is a condition in which the 1st metatarsal deviates away from the adjacent metatarsals whilst the hallux (big toe) points towards the smaller toes. The change in the alignment of these bones produces a bony growth on the side of the 1st MTPJ (big toe joint), commonly known as a bunion. Bunions have a number of causes, including hereditary disposition, loose ligaments, poor footwear, inflammatory arthritis and over pronation of the feet.
The main symptom of HAV is pain during walking or movement of the hallux (big toe). This pain is die to the degeneration of the cartilage of the joint that occurs during the formation of the bunion. Long standing HAV can also cause the neighbouring 2nd toe to retract and dislocate. This dislocation can lead to the formation of corns and calluses under the ball of the foot which can become a painful part of the foot.