Possible causes of an ingrown toenail or involuted toenail:
– Incorrectly cut nail plate (corners of the nails cut down too far)
– Growth disorders (pincer nails)
– Genetic disposition
– Foot malformations
– Toes that are too long
– Valgus malposition on the big toe (leaning sideways/Hallux valgus)
– Toes that cross over
– Shoes that are too tight
– Shoes without much support
– Overloading the feet
– Severe sweat production
– Overweight
– Nail mycosis