When your enamel breaks down there are many ways in which your teeth physically change. From the color to the shape, the loss of enamel can cause your teeth to look drastically different. Dentin is the yellowish layer of your tooth located under your enamel. As the enamel wears down and the dentin gets thinner and a thinner layer of enamel covers the dentin, it becomes more transparent and your teeth will appear more yellow. How yellow your teeth are is a good indication of how thin your enamel is; the less enamel you have, the more yellow your teeth will be. If you're uncertain as to whether your teeth are yellow from stains or due to enamel loss, try having them whitened. Artificial stains will come off. Another way in which your teeth physically change when enamel loss occurs is a change in shape. Your teeth may appear to be rounded and short. When you lose enamel your teeth may take on a rounded shape and can also cause your teeth to look shorter than normal. If you have a tooth filling, you may notice that your tooth seems to have shrunk around the filling. This shrinkage is caused by the loss of tooth enamel. Teeth that have lost a good deal of enamel may develop fractures or chips. Even if your teeth haven't developed fractures yet, you should see a doctor as soon as you notice that your teeth are looking brittle and thin. This is a sign that they might fracture soon. When enamel wears down the dentin layer underneath is revealed. Not only does this make your teeth yellow, it also makes them very sensitive to pain. This sensitivity may arise when you eat hot or cold foods and occasionally sweet foods, or when you inhale cool air. In severe enamel and dentin decay, the pulp, which is the innermost part of the tooth, could also become damaged, leading to a lesion called pulpitis. If this is the case, you will experience severe pain when you eat. When enamel and dentin begin to thin your teeth may appear shorter and you may find it more difficult to chew. The chewing surfaces of your teeth become flattened, which causes you to bite and chew your food with difficulty. Aside from it being more difficult to chew, you might also experience pain when you take a bite of food. Enamel loss makes your teeth brittle and prone to cavities. This is because enamel protects your teeth from plaque and debris buildup. When the enamel isn't there, plaque and debris buildup can result in cavities. The cavities on the surface of the tooth can enter into the deeper parts of the tooth through the opening that missing enamel has left unprotected. This can cause extreme pain and in some cases, infection due to bacteria that has an easier access through the porous structure of dentin.
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One-sentence summary -- Watch for discoloration. Look for a change in shape. Check for cracks or chips. Pay attention to any tooth sensitivity that develops. Pay attention to your biting force. Check your teeth for cavities.

By using chemical pesticides, you can often kill the insects that prey on spider mites, making it easier for spider mites to grow and populate on your plants. Spider mites have also been known to develop quick resistance to some pesticides, so it's best to control spider mites with natural methods. Female spider mites can produce up to 300 eggs continuously over a few weeks. If some eggs are unable to be killed by pesticides, the mite problem may only get worse. Before taking any steps to remove spider mites, you'll want to remove the infected plants to an area without any other plants. This will prevent the spider mites from spreading and harming your other plants. After removing the infected plant to an isolated area, begin pruning the plant, removing any stems, leaves, or other infested parts of the plant and throw in the trash. Make sure to remove until all webbing is gone. Unfortunately, you may have to remove entire plants to prevent mites from spreading to other plants if the plant is overly infested. Make sure to throw leaves directly in a trash bag so they won't spread. Throwing them in your compost pile will allow spider mites to escape to your other plants. Using a high pressure water hose or nozzle, spray plant generously. This will dislodge spider mites from the plant and kill some of them, reducing the number of spider mites on your plant. If treating an indoor plant, use a wet sponge or take it outdoors to spray. This treatment typically has to be repeated in order to effectively remove spider mites. This is a great step, because allowing natural predators to inhabit your plant will keep spider mite population to a minimum, if not dissolving it completely, and you won't have to worry about spider mites continually infecting your plants. You can purchase these predators from reputable nurseries. Ladybugs, lacewing, and predatory mites are the best predators for spider mites The best time to release predators is when spider mite levels are relatively low. You'll also want to make sure the predators you purchase are appropriate for the plant you'll be placing them on and for the season in which you'll be using them. Soap sprays are a common, natural way to kill spider mites. Combine two tablespoons of gentle soap, one to two tablespoons of cooking oil, and a gallon of water. Spray plants thoroughly, repeating every four to seven days until spider mites appear gone. Gentle soap, such as baby shampoo, may be better because heavier soaps like dish detergent can damage plants. However, you can use a harsher soap as long as you test it on a small area of the plant first, making sure the solution doesn't burn the leaves. Cooking oil will smother the insects and help the solution stick to the leaves. Be careful not to spray solution on plants when you notice beneficial insects as this will harm them as well, and avoid spraying when the sun is directly on the leaves as it will likely dry up the solution. This solution is a common way to control mites and other pests. Combine one teaspoon cayenne pepper or hot sauce, one quart of warm water, and a few drops of liquid dish detergent. Let the solution sit overnight and then sift it through a fine strainer. Spray on the bottom of leaves, keeping it away from your face, and shaking frequently to prevent ingredients from settling. Always test solution on a small portion of the plant to make sure it doesn't harm the leaves. To make an even stronger solution, add minced onion and garlic. Many essential oils can help kill and prevent spider mites. These solutions are beneficial because they will not harm the plant itself, and have natural properties that react with the spider mite, often killing it. Mix a solution of these oils in a one liter bottle, filling half of it with lukewarm water and then adding 10 to 20 milliliters (0.34 to 0.68floz) of essential oil. Some oils you might use are: Neem oil Eucalyptus oil Lemon oil Cinnamon oil Peppermint oil Rosemary oil Chrysanthemum oil Thyme oil For oils with a gentle smell, use higher concentrations, and those with a stronger smell, use lower concentrations. Never pour essential oils directly onto plant without diluting them first as this will likely damage the plant.
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One-sentence summary --
Know the benefits of organic treatment. Isolate the plant immediately. Prune the plant. Spray the plant with water. Introduce natural predators. Create a soap spray. Use hot pepper spray. Spray plant with an oil solution.