_Blisters May Form._--In mild frostbite there usually is merely tingling and slight pain. If the cold is more intense and the exposure more prolonged, blisters form with serum or blood inside of them. If the freezing is still further prolonged, the entire part becomes gangrenous because of the congealing of the blood within. Then the tissues appear bluish, shrunken or wrinkled and are without sensation or the power of motion. The best treatment for frostbite at first is friction with snow or cold water in a cold room, the changes to a warmer atmosphere being brought about gradually. After the friction the feet or hands should be swathed in cotton-wool held in position by loose bandages. If there are blisters or any discolorations of the tissues, a physician should be seen promptly. On the speed with which proper treatment is given may depend the saving or loss of a limb. _Chilblains._--Chilblains, which also are associated with a sluggish circulation, usually produce burning heat with itching and redness, and are likely to follow prolonged exposure to cold combined with dampness. They may be prevented by wearing warm, loose woolen stockings and warm shoes. The feet should be bathed in warm water daily, and after the bath should be rubbed briskly, quickly dried and dusted with a plain dusting powder. WASH YOUR NECK WELL TO WARD OFF BOILS Those frequent and unwelcome visitors--boils--always are due to skin infection. The greatest preventive is constant cleanliness of the skin, particularly of the back of the neck or other parts commonly affected. In men the back of the neck is the part most commonly affected, usually because of the constant rubbing of the collar on the hair of the lower part of the back of the head. _May Be Serious Signal._--Certain diseases, such as diabetes, seem to predispose the person to infection with boils, and the constant recurrence of boils should be the signal for a visit to the doctor. The person who succumbs readily to skin infections lacks bodily resistance. This resistance of the skin is associated with the presence in the blood of substances that will overcome bacteria. The constantly recurring warning to keep the body in the best physical state by proper diet, proper cleaning and prompt attention to infections in the ear, nose and throat is here of the greatest importance. When a boil occurs the parts around it are usually shaved, since the infection spreads from one hair follicle to another. All sorts of antiseptics may be applied and fail to control the boil unless the tissues of the body wall it off and cause it to “come to a head.” Heat aids this process by bringing a good supply of blood to the part affected. _Surgical Attention._--A boil should not be opened by some friend who happens to think himself a surgeon merely because he does not faint at the sight of blood. Improper opening or drainage of a boil may be exceedingly serious by spreading the infection to the body generally.