Under a combination of dampness and heat the skin becomes soft and tender and is apt to become blistered and abraded. Unaccustomed exercise and ill fitting shoes are responsible for most of the blisters which develop on the foot, usually on the heels and toes. They constitute the most serious troubles with which the amateur pedestrian will have to contend, especially those with a soft skin and sweaty feet. On a long hike the condition should have been averted by the toughening treatment at home as outlined above. In blistering the skin is raised and filled with a collection of watery serum. The fluid must be evacuated and the skin left intact as a protective cover during the healing process. Remove the fluid by passing a needle, which has been heated until red, obliquely through the sound skin at the edge of the blister, withdraw and allow the fluid to escape. In the case of very large blisters use a needle and thread and sterilize by boiling. Pass through the blister and snip off the ends of the thread to within ¼ inch of the blister and leave it to act as a drain. Cover all with a soft clean cloth until the serum is all out then cover with adhesive plaster. One can thus continue walking without pain and rely upon complete recovery in a couple of days. Abrasions are blisters with skin removed, due to rubbing of the shoes in walking and they are very painful because of the access of air upon the exposed nerves of the true skin. Small abrasions may be washed clean and dried, covered with an adhesive strip, and dismissed. Larger ones may need to be cleaned and treated with some antiseptic ointment and covered with absorbent cotton and adhesive. The secret is to prevent them in the first place by proper foot care, and if started to examine and treat them from time to time to prevent their enlargement. A corn is a circumscribed thickness of skin at a point, usually on a toe, where there is pressure and friction between a bony prominence and the shoe. It is similar to a callus but differs from the latter in having a central peg or core projection inward toward the bone and by pressing on fine nerves producing pain. The pain stops when the outside pressure is removed. If the corn is between two toes where it becomes macerated by heat and moisture it is called a “soft corn.” In treating a corn the cause must be remedied and this usually consists in getting footwear with plenty of “toe room,” thus relieving the pressure. For cure the callosity must be softened and removed. If the corn is not severe simply softening by soaking in hot soapy water and paring with a razor-sharp knife blade will often suffice. To remove corns: (1) Wash the foot well at bedtime. Soak for ten minutes in hot soapy water which will soften a corn so it will appear white. (2) Wipe dry. (3) Apply corn medicine. The chief ingredient of most of the advertised corn cures is salicylic acid and a convenient preparation is made by your druggist as follows: CORN COLLODION