Understanding the 10 Most Common Causes of Stress
Stress is something we all experience from time to time. Sometimes it can even be useful – it may sharpen your attention before a presentation, give you energy during an emergency, or motivate you to meet a deadline. However, stress can become harmful when it is intense, prolonged, or repeatedly occurs without enough opportunity to recover.
Sometimes the source is obvious, such as a demanding job or relationship conflict. At other times, several smaller pressures accumulate until you feel overwhelmed without being able to identify one clear reason why. In this first part of our series on stress, we explore some of the most common causes of stress.
So, Why Do We Get Stressed in the First Place?
Stress is part of the body’s natural response to demands or potential threats in our environment. It arises from a quick bit of unconscious arithmetic:
For example, if you have one, relatively simple task that you know will take 10 minutes to do (demand), and you have two hours in which to complete it (resources), you are unlikely to feel particularly stressed.
However, if you have 10 things to do, each of which will likely take at least 10 minutes (demands), and you only have half an hour to get them all done (resources), you are likely to feel quite stressed. Your perceived capacity has been exceeded, triggering a stress response.
When your brain decides that something requires urgent attention, hormones such as adrenaline and cortisol are released to prepare you to act.
Your heart may beat faster, your muscles may tense, and your attention may narrow towards the immediate situation. The problem arises when this response is activated repeatedly without enough time to recover in between:
- Acute stress is short term and linked to an immediate challenge, such as an exam, deadline, or difficult conversation. It usually settles once the situation has passed.
- Chronic stress continues over a longer period, or occurs when one demand is quickly replaced by another. Over time, it can affect your mood, health, behaviour, relationships, and daily functioning.
Both acute and chronic forms of stress can have similar causes. The main difference is how long the stress continues.
The Most Common Causes of Stress
Stress develops through an interaction between the demands caused by the situation around you, the expectations you place on yourself to meet those demands, and the resources you have available to cope. This means a situation that feels manageable to one person, may feel highly stressful to another, leading to a wide range of potential causes.
These are 10 of the most common.
1. Work or Study Pressure
Work and study can become stressful when demands feel relentless or difficult to control. Excessive workloads, unrealistic deadlines, long hours, conflict, unclear expectations, and insufficient support can all contribute.
Stress may become more persistent when work or study extends into evenings, weekends, and time that would otherwise allow you to recover.
2. Change, Uncertainty and a Lack of Control and Predictability
Significant changes can be stressful because they disrupt routines and reduce predictability. This can include welcome changes, such as moving house, starting a new job, becoming a parent, getting married, or receiving a promotion, as well as more difficult experiences such as separation, bereavement, illness, redundancy, or migration.
Different changes can create stress in slightly different ways. Some require you to establish new routines or make significant decisions when you don’t yet feel you have all the information. Others leave you dependent on circumstances beyond your control. Situations with uncertain outcomes, such as waiting for medical results, experiencing unstable employment, or navigating an unpredictable workplace or relationship, can create ongoing tension because you do not know what demand may arise next.
Uncertainty can also keep your mind focused on possible future problems, even when nothing is happening in the present. The brain may interpret these possibilities as potential threats, activating the stress response in preparation for demands that have not yet occurred.
3. Too Many Competing Responsibilities
Sometimes no one, single responsibility or demand is unreasonable; there are just too many things requiring your attention at once.
You might be balancing employment, household tasks, study, appointments, and relationships. Even positive commitments and hobbies can become stressful when they compete for limited time and energy.
The mental effort involved in remembering, organising, and coordinating everything can also add to the invisible workload.
4. Financial Pressure
Financial stress can arise when your income or savings feel insufficient to meet everyday expenses, debt, housing costs, unexpected bills, or the needs of dependants.
It can also come from uncertainty rather than immediate hardship. Insecure employment, fluctuating income, rising living costs, or concern about future expenses can keep financial pressure present in the background, even when bills are currently being paid.
Because money affects housing, healthcare, relationships, and future plans, financial stress can be difficult to contain and an ongoing source of stress.
5. Constant Mental Stimulation and Availability
Emails, news, notifications, messages, and online platforms can leave very little separation between one demand and the next.
You may be physically away from a stressful situation while remaining mentally connected to it: checking messages during family time, thinking about work over dinner, or rehearsing tomorrow’s tasks while trying to sleep.
The stress comes not necessarily from technology itself, but from feeling that you must remain alert, responsive, and available.
6. Relationship and Family Difficulties
Conflict, parenting demands, disconnection, separation, caregiving pressures, and uncertainty in important relationships can all cause significant stress.
Relationship difficulties can feel particularly consuming because they affect an area of life that would ordinarily provide support. Stress may also become cyclical: external pressure reduces your patience or emotional availability, creating further tension in your relationships.
7. Difficulty Setting Boundaries
Stress can build when you feel responsible for meeting everyone else’s needs or expectations.
You may find it difficult to say no, to decline invitations, delegate tasks, disappoint others, or say that you do not have capacity. As commitments accumulate, your own health, interests, relationships, and opportunities for recovery may be pushed aside.
This can be driven by fear of conflict, workplace expectations, concerns about others’ opinions, or a strong sense of responsibility.
8. Perfectionism and High Self-Expectations
Perfectionism can make ordinary responsibilities feel as though they must be completed to an exceptionally high standard, even when ‘good enough’ would do.
This misperception of what the task requires of you increases stress as you might spend excessive time checking details, struggle to decide that something is finished, or become distressed by minor mistakes. While you devote substantial energy to doing some things perfectly, other responsibilities may also accumulate.
High self-expectations can also make rest feel undeserved, creating a persistent sense that there’s always more you could be doing.
9. Reduced Capacity
Feeling stressed does not always mean there are too many demands upon you. Sometimes stress results when the resources that allow you to cope with your usual demands are lessened for some reason.
This could be due to a range of factors:
- Personal illness, hormonal changes, or other biological shifts
- Insomnia or sleeping difficulties
- Having had fewer recent opportunities to recover from other stressors
- Needing to function with fewer supports than usual
- Other mental health or emotional situations, such as grief, loneliness, anxiety or depression
Sleep difficulties create a particularly vicious cycle in stress. You have trouble sleeping due to stress, and lack of rest therefore reduces your mental resources to cope with the demands on you, resulting in further stress.
Feeling less able to cope during these periods does not mean you have become less capable; it may simply reflect that your available resources have changed.
10. Trauma or Threatening Experiences
Traumatic experiences involving danger, violence, abuse, serious accidents, disasters, or sudden loss can activate an intense stress response. The effects may continue after the immediate threat has passed, particularly when the experience has disrupted your sense of safety, trust, or control.
Stress can also arise through repeated exposure to distressing situations or material, including via social media and the news. This may also affect emergency workers, health professionals, carers, and others whose roles regularly bring them into contact with traumatic stories.
Responses following trauma vary considerably and be highly distressing. Accessing support is important, form loved ones or a professional.
Stress Is Usually Cumulative
Chronic stress is often the result of several pressures accumulating rather than one major event.
A demanding week at work may be manageable on its own. So might disrupted sleep, financial uncertainty, family conflict, or an upcoming change. But when they pile up, these pressures may begin to exceed your available capacity.
Stress can therefore build even when no single problem seems serious enough to explain how you feel. The combined effect of many smaller demands may be just as significant as one major stressor.
You can also become accustomed to functioning under significant pressure without recognising its effects.
In Part Two of this series, How to Recognise Stress: The Key Indicators, we explore the myriad of different signs of stress, and why they’re so easy to overlook.
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If you’d like to read more about stress in modern life, Why Zebras Don’t Get Ulcers by Robert Sapolsky is an accessible, thorough, and humorous exploration of how the human stress response can harm our health when repeatedly activated by ongoing sources of tension.