5 signs that you're in a toxic relationship

• Relationships can be difficult, but when do they go from difficult to detrimental?
• Some people rely on emotional signs or tend to repress their emotions, but oftentimes, our bodies are strong indicators of whether relationships are sustainable.
• These five warning signs may serve as red flags for the fact that an unhealthy relationship could be at fault as well as the risk for an even bigger problem.

It's no secret that for as much as we love to be in love relationships are hard. Relationships require work and that work and communication can be emotionally taxing. But when does all that work cross a line into unhealthy territory?

There are the obvious emotional signs that things have taken a turn for the worse, whether that means sadness because of a partner's manipulative behavior or anger because of their high-conflict personality. Sometimes, though, our bodies can tell us things that our emotions aren't, can't, or that we may be just refusing to see.

These five physical signs may be indicators that a relationship has gone from hard or tough to physically unsustainable. If your body is telling you these things, the line may have been crosses into unhealthy territory.

You can't get adequate sleep.

Your partner and your relationship shouldn't be the reason you're losing sleep, literally or figuratively. A full night's sleep is pivotal for the body to function as it should, giving you a necessary recharge in order to take on work, school, or social activities. Once you start waking up or fluctuating from a healthy sleep pattern, that can big sign that things have gotten out of hand.

"When you're typically a sound sleeper and all of a sudden you wake up with an anxious feeling it's a sign your relationship has you stressed," Lisa Concepcion, a "love strategist" and the founder of LoveQuest Marketing, told Bustle.

If your lack of sleep becomes consistent, not only can it affect your performance in school or work, it can also lead to a whole roster of other physical risks, including cancer and a weakened immune system.

Your heart isn't functioning normally.

Being heartbroken is a real thing, though we usually tend to associate it with the emotional turmoil of going through a breakup or a split. In truth, heartbreak can be the physical symptoms that come with an unhealthy relationship and it can actually lead to cardiovascular problems, which are extremely serious.

According to Psychologytoday.com, a study followed more than 10,000 subjects for over a decade. Researchers found that subjects in negative or unhealthy relationships seemed to be at a greater risk for developing heart problems, including a fatal cardiac episode, than their counterparts who were in positive, close relationships.

If you've been feeling off and have noticed a change in your cholesterol, blood pressure, or overall health, it could be due to the circumstances surrounding your love life. The heart is one of the most important organs in the body, so it's vital that you maintain your cardiovascular health, even if it means a tough breakup.

You're constantly sick.

One of the greatest indicators of a problem is depression. For many, depression is biological and not circumstantial, but if you're in a dark place, it can bring on or exacerbate pre-existing situationally depressive conditions.

Depression is usually accompanied by a whole slew of tough physical side effects, but one of the most physically-damaging is that it can weaken the immune system, according to WebMD. A weak immune system means that the body can have a tougher time fighting off infections and vaccinations may even prove to be less effective.

If you're not only displaying the emotional symptoms of depression but you're also feeling it physically, your relationship might be worth examining.