Formation of corns
People who stand and walk for a long time are more prone to it, and friction and oppression are the main incentives. Too tight shoes or deformed foot bones will thicken the corner layer of the foot that is rubbed or oppressed, push it inward, and become a cone-shaped horny thing with an inward tip.
Clinical manifestations of corns
The lesions are round or oval, accompanied by localized keratinocyte proliferation, the size is as small as needle to broad bean, light yellow or dark yellow, the surface is smooth, the skin surface is flat or slightly raised, the boundary is clear, and the inverted conical keratin plug is embedded in the central dermis. Because there are nerve endings in the dermis at the top of keratin plug, it will cause pain when standing or walking. Cornea is common in the third metatarsal bone in the front and middle of the foot, the lateral edge of the toe tibia, and the protruding and easy-to-rub parts, such as the back of the little toe and the second toe or toe.
Differential diagnosis of corns
It is not difficult to diagnose the disease according to the characteristics and prone parts of the injury. Should be identified as follows.
1, plantar wart
It is not limited to the compressed part of the sole of the foot, and the surface is like horny hyperplasia. When dermatoglyphics are interrupted, there are often black bleeding spots, and the squeezing pain is obvious.
2. calluses
In the compression of the sole part, it is found that no keratotic spots or bands are formed, the surface is smooth, the edge is unclear, and it will not cause pain when walking or rubbing.
3, palmoplantar punctate keratosis
There are many isolated conical cuticles in the palm and sole, which do not wedge into the skin and are not limited to the friction parts.
Treatment of corns
1, external corrosive agent
Corn paste can be used for external use, as well as 10% salicylic acid glacial acetic acid, 30% salicylic acid collodion and crystal paste. External corrosive agents should protect the surrounding panels. Cut a small hole in the center of the zinc oxide tape, the size of which is the same as the skin lesion, and stick it on the damaged part of the panel to expose the skin lesion. Then twist the thin strips of adhesive tape into a rope to enclose the hole to form a dam, then apply medicine, cover a large piece of adhesive tape, and change the medicine for 3 ~ 7 days/kloc-0 times until it falls off.
2. Physical therapy
Electrocautery, carbon dioxide laser cautery, exposure to x-ray irradiation.
3, surgical resection.
Prevention of corns
In order to prevent corns, friction and squeezing should be reduced. Shoes and boots should be soft and fit, and the shoes can be lined with thick and soft insoles or sponge pads, and holes * * * perforated insoles can be cut at the place equivalent to corns. The deformity of the toes should be corrected, and if there is exostosis of the foot, it should be treated surgically. How to treat corns?