There are many factors that can impact one's life expectancy, but there are some signs you may not have even considered.

We all know that excessive drinking and smoking can have negative repercussions on our health, but we're not guaranteed to last for a century if we abstain from those habits.

For the most part, it's not so much about the quantity of life, but the quality of it. Keeping tabs on what our bodies are indicating about our health is crucial to living a happy and healthy life.

Here are a some warning signs you may not have considered.  

Chronically fatigued

Whether you rarely get any sleep or get enough sleep, always feeling tired can have grave repercussions on your health. This may indicate that you're not receiving the right amount of exercise or food. If it's more serious than that, it could mean you suffer from chronic fatigue syndrome, which would mean you need to see a doctor immediately!

Sitting for too long

It's hard to find time for exercise. We spent most of our time sitting at our office desks, or sitting at home watching TV or surfing on the internet. I'm sure you know how bad inactivity is for you, but if you can find ways to stand up or get a little more exercise between those period of sitting, it can be very beneficial for your overall well being. You won't see the effects on your body tomorrow, but you'll see the health issues mounting up a few years down the line, if you don't change this bad habit.

Feeling lonely

Studies have shown that cuddling releases hormones in the body that strengthen your immune system. Merely being around someone and engaging in conversation also releases those immune-strengthening hormones. One U.S. study suggests that loneliness can increase your chance of death by 14%. Whether you're extroverted or not, we all need some kind of social life, whether it is a few good friends or many to choose from to spend time with.  

Unhealthy body weight and shape

I'm sure you're not surprised to see obesity on this list. Many studies have shown that obese people are at risk of heart disease, diabetes, cancer, and many other health problems. If you're physically out of shape, you need to start thinking of changing your eating habits and exercising regularly.

Location

Cities that have lots of pollution, traffic jams, and are more prone to natural disasters may be shortening your life expectancy. If you find the nature of your city is increasing your stress levels, this is probably an indication that you need to consider finding another place to live.

These next ones may be a surprise to you...

Weird nails

If your nail looks like it's withering away, or there are a lot of spots, discoloration, or bumps on them, you could be suffering from some serious health issues. For example, dark streaks on your nails may indicate cancer. Take a close look at your nails, and if you catch anything out of the ordinary, consult your doctor immediately.

Bad food choices

You are what you eat. I'm sure you're not gorging on processed and high-sugar content foods because you think you're going to live until you're 100, but if you care even an ounce about your health, this needs to stop. Make a goal to slowly eliminate or reduce your sugar intake, red and processed meats, sodium, and trans fats.

You struggle to lift relatively light objects

If lifting grocery bags and moving small pieces of furniture around the house are difficult tasks, this is a sign of low muscle mass. The weakness in various muscles in your body is an indication that you have more fat than muscle. This increases one's risk for life-threatening diseases like heart disease and diabetes.

Education

There's been various studies that show people who achieved a higher level of education and have spent more time in school are more likely to live longer. Data from the Centers for Disease Control and Prevention shows that people with a college degree tend to live approximately 9 years longer than those who didn't finish high school. Also, people with more degrees have a better chance of obtaining higher paying jobs that will allow them to afford more nutritious food.

Swelling and inflammation

We're all human, our bodies swell every now and then, but if this is a chronic condition for you, it can mean that the cells in your body are deteriorating.

If you have any of these signs, go and see a doctor as soon as possible.