In one sentence, describe what the following article is about: Flirting is a great way to judge whether your crush is reciprocating your feelings. There are many different ways to flirt. For example, you can try gently teasing your crush about a mistake, as long as you keep things good-natured. You might also try delivering a suave compliment or making a subtle innuendo while you're talking with each other. Touch is also a good idea — try reaching out and touching your crush's shoulder when s/he says something that makes you laugh, for instance. If your crush goes along with your flirting or returns it, this is a good sign. See our flirting article for many more tips. Crushes aren't always logical. If you're captivated by someone's looks and confidence, you may get a crush for this person before you have a good idea of who this person is. You don't want to make a move on someone only to find out later that you're not actually attracted to this person, so try to spend at least a little time together (alone or in groups) before you take the plunge. If you're nervous about spending casual time with your crush, pick activities that you know you're good at. Your natural confidence will make it easier to keep your cool while you're interacting. For example, if you're good at tennis, you might challenge your crush to a few friendly volleys. No matter how confident you are, asking a crush out can cause some major butterflies. A good way to "defuse" the situation is to make your request a casual one. This takes some of the pressure off — your crush isn't deciding whether to express his or her undying love for you, just deciding whether to spend a little time together. You don't even have to bring up the idea of romance yet. For instance, you might simply ask your crush, "Hey, do you want to go get some Mexican food after school?" If you hit things off on your first hang-out session, then you can start hinting that you'd like to be more than friends. Crushes aren't the end of the world. Try not to let yourself get too invested in the outcome of asking your crush out. For one, a "no" may have nothing to do with you — there may simply be other commitments that make romance impossible. More important, though, is the fact that one person's opinion of you doesn't matter. Crushes come and go, so don't let one determine how you feel about yourself.
Summary: Flirt a little to test the waters. Spend a little time with each other before you make any decisions. Be direct with your intentions, but keep things casual. Don't put too much weight in your crush's reply.

Problem: Article: Creatinine is a waste product produced by the body when creatine, a metabolism substance that helps convert food into energy, breaks down.  Usually, your kidneys help filter creatinine out of the blood. The waste product is then passed out of the body via urine. High creatinine levels can indicate a problem with your kidneys. High creatinine levels can be the result of regularly consuming a high amount of protein or partaking in strenuous exercise. Creatine supplements may also increase levels of creatinine in blood and urine. A creatinine test measures how much creatinine is in your blood.  Your doctor may also perform a creatinine clearance test, which measures the amount of creatinine in your urine. The amount in your blood should be low, and the amount in your urine should be high. These tests only provide a "snapshot" of your kidney health. They only measure the amount of creatinine in your blood and urine from one-time samples taken within the past 24 hours. The normal range for creatinine levels will vary based on whether you are an adult male, adult female, teenager, or child. The value you should be at may vary further based on your age and body size, but there are general ranges you should shoot for.  Normal blood creatinine levels are: Men: 0.6 to 1.2 mg/dL; 53 to 106 mcmol/L Women: 0.5 to 1.1 mg/dL; 44 to 97 mcmol/L Teenagers: 0.5 to 1.0 mg/dL Children: 0.3 to 0.7 mg/dL   Normal urine creatinine levels are:  Men: 107 to 139 mL/min; 1.8 to 2.3 mL/sec Women: 87 to 107 mL/min; 1.5 to 1.8 mL/sec Anyone above the age of 40: levels should drop by 6.5 mL/min for every additional 10 years of age There are several different reasons why you might have increased creatinine levels; some of these conditions are more severe than others, but all mean that you need to take steps to get your creatinine levels back to normal.  Renal failure or impairment: If your kidneys are damaged, they cannot filter creatinine out of your body through glomerular filtration as they are supposed to. Glomerular filtration is the outflow of filtered fluid passing through your kidney. Muscle destruction: If you have a condition that causes the breakdown of your muscles, the broken down muscle tissue can get into your bloodstream and impair your kidneys. High intake of meat: Eating a diet rich in cooked meat can increase the amount of creatinine in your body. Hypothyroidism: Having a dysfunction in your thyroid gland can have an influence on your kidney function. Hypothyroidism can decrease your kidneys’ ability to properly filter waste out of your body.
Summary:
Know what creatinine is. Understand how the test works. Interpret your results. Understand why increased creatinine levels occur.