Poor quality sleep can affect many areas of your life and health, and your doctor may be able to help you if you have difficulty sleeping or have insomnia or other sleep disorders. Learn more about the health consequences of sleep loss. If you're concerned about having trouble falling asleep or staying asleep, assess your risk for a sleep disorder. It's wonderful that you got a good night's sleep last night.
A callus (or callosity) is a toughened area of skin which has become relatively thick and hard in response to repeated friction, pressure, or other irritation. Rubbing that is too frequent or forceful will cause blisters rather than allow calluses to form. Since repeated contact is required, calluses are most often found on feet because of frequent walking. Calluses are generally not harmful, but may sometimes lead to other problems, such as skin ulceration or infection.
A callus is a spot where your skin becomes rough and thick. After wearing flip flops every day, all summer long, you'll probably have a callus between your toes. If you bet a blister from playing tennis or digging in the garden, it will eventually turn into a callus if you keep swinging your racquet or using your trowel. Any spot on your skin that's rubbed and irritated repeatedly becomes a callus, or a thickened patch of skin. In medicine, another kind of callus is the bony tissue that forms when a broken bone heals.