Dirty dishes piled up in your sink. Clean clothes mixed with dirty ones on the floor. Junk mail sitting on your desk. Oh, and is that an old food wrapper under the couch?

If your home is messy or disorganized, were with you.

Very few people actually experience a clutter-free or mess-free life, said Michael Tompkins , psychologist and co-director of the San Francisco Bay Area Center for Cognitive Therapy.

While some people may view messiness as a sign of laziness, the reality is that there are many unexpected reasons you might be messy from life stages to personality traits to mental health conditions.

We talked to experts about what these reasons are, and how to know whether messiness is a harmless part of your lifestyle or a problem thats causing you distress. Read on for what might be the not-so-obvious reasons behind your clutter:

1. You may have ADHD.

Disorganization is one of the hallmark symptoms of attention-deficit/hyperactivity disorder, said Terry Matlen , a psychotherapist and author of The Queen of Distraction. Executive functioning is universally impaired in the ADHD brain.

This includes having trouble planning, initiating and completing tasks, and problems with working memory.

When you have difficulties with working memory... its very difficult for you to follow through from beginning to end of certain tasks, Tompkins explained. That means that you might get distracted easily.

For example, when you walk into your house, you might get distracted by your dog running to greet you, and so you put your keys down on a chair instead of in their designated bowl.

Its not even a conscious decision, Tompkins said. The person just has trouble holding on to this idea of... putting their keys in the bowl. Clutter can then ensue, he said.

People with ADHD may also feel overwhelmed by the steps involved in completing tasks, which can lead to shutting down and not being able to manage clutter, Matlen said. For instance, you may be reading a magazine and then realize you forgot to clean up the dinner dishes, and that your clothes have been sitting in the washer for days.

The question/problem becomes: Where do I even start? she said. Executive function gets slammed.

Tasks of low interest or with no real deadline are especially difficult for people with ADHD to initiate, said Natalie Christine Dattilo , a psychologist and instructor at Harvard Medical School. Household chores like folding laundry or putting away dishes often fall into that category.

2. You may be dealing with depression and/or anxiety.

The state of our physical space can be a reflection of our state of mind, Dattilo explained. Our home may be messy and cluttered because we are overwhelmed and unorganized mentally, or simply too exhausted and burned out to keep up.

A person who is experiencing depression is likely feeling low energy and a lack of motivation.

Our motivation comes from a part of the brain that anticipates reward, and when we are depressed, that part of the brain effectively shuts down, Dattilo said. This can create a sense of apathy... which makes it even harder to generate the energy needed to initiate a difficult task like organizing, cleaning or decluttering.

Depression and anxiety can also cause difficulty with concentration, which can make small tasks feel overwhelming, Tompkins said.

In addition, studies have shown that clutter in our homes is associated with high cortisol levels the stress hormone, Dattilo noted. So not only can feeling depressed or anxious affect our organization, but a cluttered home can make us feel more stressed and overwhelmed.

3. You may be going through a stressful life transition.

Big life changes can be stressful, and might affect a persons ability to manage clutter even for someone who is usually tidy.

If a person experiences a psychosocial stressor, it can impair their ability to cope, Tompkins explained. Because theyre stressed... they may deprioritize getting things done around the house. Who hasnt had that experience?

Matlen said having kids can be a particularly tough transition, especially for parents with ADHD.

Now you not only have others to care for when caring for yourself can be hard, but theres also an onslaught of sensory electric shocks... crying babies, demanding toddlers, messes, meal planning [and] routines, she said.

Some other life transitions that can be challenging: starting college, moving in with a partner, getting married, going through a divorce and dealing with hormonal changes (like perimenopause and menopause).