In one sentence, describe what the following article is about: People who smoke or chew tobacco are four times more likely to develop gum disease. Continued tobacco use can also make treatment less effective. Make an effort to quit smoking or quit chewing tobacco. . Clenching your jaw or grinding your teeth can cause receding gums. If you grind your teeth at night, a doctor can recommend a device to wear to stop this. Reducing stress or meditating may help, although this has not been thoroughly studied. Hypnosis therapy may be effective for some people. Constant headaches in the morning that continue throughout the day, earaches, and facial muscle soreness are all signs that you might grind your teeth in your sleep. Certain medications increase the chance of unhealthy gums. These include steroids, oral contraceptives, some anti-epilepsy drugs, some cancer therapies, drugs used after organ transplant, and some drugs used to treat migraines or blood pressure. Bring up your concerns with your doctor. Depending on your condition and the medications available, he may recommend a treatment that's less harmful on your gums. . Diabetes can lead to higher glucose levels in your saliva, which encourages bacterial growth on gums slowing blood flow to the gums. If you are diabetic, keep your blood sugar levels under control to reduce this risk. . Eating disorders can cause poor nutrition, which can lead to bleeding, vulnerable gums and erodes the tooth surface leading to substance loss. Vomiting can cause additional damage due to stomach acid. Seek help from medical professionals, mental health experts, and emotionally supportive friends. . Any piercing in the mouth, including the lips, can cause infection. To avoid gum recession and more serious, life-threatening issues, take the following precautions:  Have a professional perform the piercing, and ask about their sterilization practices first. Talk to a doctor first if you are pregnant, have allergies, diabetes, a skin disorder, or heart disease. For several days after piercing: Keep swelling down with cold and sleep with your head slightly elevated. Avoid alcohol, tobacco, and spicy food. Rinse with (non-alcohol) antibacterial mouthwash after each meal. All the time: Wash your hands before handling the piercing. Try to avoid touching the piercings to teeth and gums. Visit a doctor immediately if you have pain, swelling, or red streaks. If you throw up frequently for any reason, stomach acid can wear away at your teeth. After vomiting, rinse with a mixture of baking soda and water to neutralize the acid. Do not brush your teeth immediately after vomiting. If you wear dentures and feel them becoming too loose or too tight, visit a dentist. This could be causing your receding gums, or the change in your teeth could cause the change in fit. Either way, a dentist can alter them to fit more comfortably, and identify the cause.
Summary: Reduce tobacco use. Stop grinding your teeth Talk to your doctor about medications that may cause gum problems. Keep diabetes under control Overcome eating disorders Take care of mouth piercings Rinse with baking soda after throwing up. Get your dentures refitted.

In one sentence, describe what the following article is about: Easier said than done! You may be able to determine the age based on clues in the design. Look for historical events or figures, or try to pick out words on the stamp. Exact years are not typically printed on stamps, so it can be quite difficult figure out exactly how old your stamp is.  Head to an expert stamp dealer if you need extra help. The older the stamp is, the more valuable it will be--so it’s worth the extra effort! Stamps printed within the last 70 years, even those in mint condition, probably won’t be valued any higher than they were originally. As with the stamp’s age, look for historical figures or events on the stamp, or words--knowing the language can help you narrow down the country. A picture of Queen Victoria, for example, is probably from 19th-early 20th century Great Britain, while a picture of the Hoover Dam may be mid-century American. Depending on your stamp, it might be easier to identify it before you try to determine the age and country of origin. After you’ve looked over the stamp’s physical condition, you’ll know enough about it to be able to find it in a reference book.  American stamp collectors often use the Scott Specialized Catalogue (now available in an e-book format as well), while British philatelists tend to use the Stanley Gibbons catalogue. Check out your local library to see what options you have. You can try looking at online resources and catalogues as well, but do so with a grain of salt. They may not be as accredited or accurate as reference books. The stamp’s rarity will depend on its age and quantity in its initial print run. The rarer the stamp, the higher the value; some stamp collectors even say that rarity is the single most important factor in determining stamp value, more than condition or age. Check in reference books or with a professional dealer to figure out the initial print run of your stamp. An old stamp won’t necessarily be rare and valuable. The 1861 1-cent Benjamin Franklin stamps, for example, aren’t very valuable because about 150 million of them were produced. Though in general you want your stamp to be as perfect as possible, error stamps are an exception. These rare stamps have an error in the design rather than the centering, perforations, etc. Error stamps are extremely valuable because of their scarcity; there may only be 50 or 100 of them in existence. Valuable stamp errors include design errors, such as a map showing the wrong border; an omission error, such as Thatcher Ferry bridge stamps in which the bridge itself was missing in the design; or an inversion, like the American Inverted Jenny stamps, which printed a biplane upside down.
Summary:
Figure out the age of the stamp. Determine the stamp’s country of origin. Identify the stamp with a reference book. Determine the rarity of the stamp. Keep an eye out for error stamps.