The risk of getting sick increases drastically as we grow old and our immune system becomes weaker, according to doctors. While it is recommended that you get a full physical check-up every 2 years, here are some quick tests you can try at home for your own peace of mind. These will only take about 30 seconds and let you know if everything is okay with your body or not.

1. Squeeze the roots of your nail firmly.

With your right thumb and index finger, put pressure on the top part of your left hands’ fingers by squeezing the roots of nails. Start with your thumb and hold for 3-5 seconds. After that, proceed to other fingers and repeat the same.

After you remove the pressure, blood should come rushing back in no more than 2 seconds. If it does, your body has sufficient blood flow. Your fingers are closely connected to your internal organs and if the above test was painful for you, there might be something wrong. Here’s what pain in different fingers means, according to experts:

• Thumb: If squeezing your thumb’s nail was painful to you, this might be a sign of a lung problem.

• Index finger: Closely associated with your large intestine, pain in this finger is an indication of colon troubles and constipation.

• Middle finger: Pain in your middle finger is a sign of heart problems.

• Ring finger: Ring finger is deeply associated with your heart and if squeezing the top of it was painful to you, it could be a sign of heart issues.

• Little finger: Pain in your little finger indicates problems with the small intestine.

2. Clench your hand into a fist.

For this test, make a fist and hold your hand in the same position. After 30 seconds, open your fist and you will notice that your palm has turned white. When you make a fist, your blood vessels get squeezed, restricting the blood flow to your hand.

If after you free your hand, the blood comes rushing back, it means your blood vessels are working just fine and you are healthy. On the other hand, if it takes a while for the palm to turn back to its usual red again, it can be a sign of arteriosclerosis.

3. Stretch your butt muscles.

• Lie down comfortably with your face facing the floor.

• Keep both of your arms straight by your side.

• Keep your left leg flat and slowly raise your right leg up.

• Bend your leg at the knee and hold this position for 30 seconds.

If you do this successfully, your body is healthy. But, if the test was painful for you, you might have a problem with your gluteus maximus, one of the strongest muscles in your body.