Impaired social relationships refers to a persistent difficulty forming, maintaining, or navigating connections with other people. It’s not the same as being introverted or occasionally awkward. It describes a pattern where someone consistently struggles with the back-and-forth of social life: reading body language, sustaining friendships, responding appropriately to emotions, or adjusting behavior for different social settings. About 1 in 6 people worldwide experiences loneliness, according to the WHO’s 2025 global report, and the underlying social difficulties driving that isolation range from developmental conditions to mental health disorders to the long-term effects of trauma.
What It Actually Looks Like
Social impairment shows up differently depending on the person and the underlying cause, but certain patterns are common. Someone might have trouble with reciprocity, the natural give-and-take of conversation where you respond to what the other person says and share something back. They might miss nonverbal cues like facial expressions, tone of voice, or body posture. They might not spontaneously share excitement or interests with others, or they might struggle to adjust their behavior depending on the context (speaking the same way in a library as on a playground, for example).
In clinical settings, social impairment is often described across three core areas: difficulty with social-emotional reciprocity, difficulty with nonverbal communication, and difficulty developing and maintaining relationships appropriate to one’s age and development. These three areas form the social criteria for autism spectrum disorder in the DSM-5, but they also serve as a useful framework for understanding social impairment more broadly. The key distinction is that these aren’t occasional missteps. They represent a consistent gap between what’s expected socially and what the person is able to do.
Conditions That Cause Social Impairment
Impaired social relationships are a feature of many different conditions, and understanding which one is driving the difficulty matters because the experience and the path forward are quite different.
Autism Spectrum Disorder
In autism, social difficulty stems from differences in how the brain processes social information. Someone on the spectrum may not instinctively track eye contact, may interpret language very literally, or may not pick up on the unwritten social rules that most people absorb without being taught. A key marker is reduced conceptual adaptive skills, things like communication ability and flexible thinking, which tend to be lower in autistic individuals regardless of whether they also experience anxiety. This distinguishes autism from other conditions where social struggles are driven more by fear than by processing differences.
Social Anxiety Disorder
People with social anxiety often have the social skills themselves but are too afraid of judgment or embarrassment to use them. Research comparing autistic and non-autistic university students found that high social anxiety lowered social functioning scores to the same degree in both groups. In other words, anxiety impairs social behavior whether or not someone is autistic. The difference is that when anxiety is treated or reduced, social skills in non-autistic individuals typically bounce back to normal levels, while autistic individuals may still face underlying processing challenges.
Borderline Personality Disorder
In borderline personality disorder, relationships tend to be intense but unstable. The hallmark pattern is a cycle of idealization and devaluation: seeing someone as perfect and wonderful, then suddenly perceiving them as terrible or untrustworthy. This creates a push-pull dynamic that’s exhausting for both the person with BPD and the people around them. The social impairment here isn’t about missing cues or feeling afraid. It’s about emotional dysregulation that makes steady, balanced relationships extremely difficult to sustain.
Depression and Trauma
Depression can shrink a person’s social world by draining motivation, making conversation feel effortful, and creating a sense of worthlessness that makes reaching out feel pointless. Trauma, particularly childhood trauma, can rewire how someone perceives safety in relationships, leading to difficulty trusting others, hypervigilance to social threats, or emotional numbness that blocks genuine connection.
How the Brain Processes Social Information
Social behavior depends on a network of brain regions working together. The amygdala, a small structure deep in the brain that processes emotional significance, connects to the prefrontal cortex (the area responsible for decision-making and behavioral control) to help you evaluate social situations. These circuits are involved in learning from social experiences, reading people’s intentions, and deciding how to respond. A separate connection between the amygdala and the hippocampus supports social memory, helping you remember who someone is, what your history with them looks like, and how to interact with them. When any part of this network doesn’t function typically, social behavior can be affected in ways the person may not fully understand or control.
Early Signs in Children
Social development follows a predictable timeline, and missing certain milestones can be an early indicator of impairment. The American Academy of Pediatrics outlines key social behaviors by age:
- By 2 months: a baby should look at a parent’s face, smile when smiled at, and calm down when spoken to or picked up.
- By 9 months: a child should respond to their name, show a range of facial expressions, react when a caregiver leaves, and show wariness around strangers.
- By 15 months: a toddler should show a parent objects they find interesting, copy other children during play, and show affection through hugs or kisses.
- By 2 years: a child should notice when others are hurt or upset, and look at a parent’s face to gauge how to react in a new situation.
- By 4 years: a child should engage in pretend play, ask to play with other children, comfort someone who is sad, and adjust their behavior based on the setting.
Missing one milestone isn’t necessarily cause for alarm, but a pattern of absent or delayed social behaviors, especially across multiple age points, warrants a closer look. Pointing to share interest (not just to request something) is one of the most closely watched early social behaviors, typically expected by 15 to 18 months.
How Social Impairment Is Measured
Clinicians use standardized tools to assess the severity of social difficulties. One widely used instrument is the Social Responsiveness Scale (SRS-2), which produces a score based on observations from parents or teachers. Scores at or below 59 fall in the normal range. Scores between 60 and 65 indicate mild difficulties, 66 to 75 indicate moderate difficulties, and scores of 76 or above fall in the clinical range, suggesting significant social impairment that likely warrants intervention. These scores help clinicians move beyond subjective impressions and track whether someone’s social functioning is improving over time.
The Health Cost of Social Isolation
Impaired social relationships don’t just affect quality of life. They affect physical health. A large meta-analysis found that social isolation is associated with a 33% higher risk of dying from any cause. That increased risk persists even after accounting for other factors like income, lifestyle, and pre-existing health conditions. The pathways are both direct and indirect: isolated people are less likely to access healthcare, more likely to adopt unhealthy habits, and more vulnerable to chronic stress, which takes a measurable toll on the cardiovascular and immune systems.
The workplace effects are real too. When social isolation combines with depressive symptoms, self-reported productivity loss reaches roughly 24%, meaning people estimate losing about a quarter of their work capacity. Interestingly, social isolation alone doesn’t significantly reduce productivity in working adults. It’s the combination with depression that creates the steepest decline, suggesting that staying socially disconnected becomes most damaging when it feeds into or coexists with low mood.
Loneliness rates are highest among teenagers and young adults, with 17 to 21% of people aged 13 to 29 reporting significant loneliness. People in low-income countries experience loneliness at roughly double the rate of those in high-income countries (24% versus 11%), pointing to the role that economic resources, infrastructure, and community structures play in enabling social connection.
What Helps
Social skills training is the most studied intervention for social impairment, particularly in autism. Meta-analyses show it produces medium to large improvements, with effect sizes around 0.81 to 0.93 depending on the delivery format. That translates to meaningful, measurable gains in social competence, friendship quality, and reductions in loneliness. Both in-person programs and technology-based approaches (like video modeling or virtual reality practice) show comparable benefits.
For social anxiety, cognitive behavioral therapy is the standard approach, targeting the fear and avoidance patterns that keep someone from using the social skills they already have. For borderline personality disorder, dialectical behavior therapy focuses on emotional regulation and interpersonal effectiveness, teaching specific techniques for navigating conflict and maintaining stable relationships. Each of these approaches works because it targets the specific mechanism behind the social difficulty, not social behavior in general.
What doesn’t tend to help is simply telling someone to “put themselves out there.” When social impairment has a neurological, developmental, or psychiatric basis, exposure alone without structured support can reinforce negative experiences rather than build skills. The most effective interventions are specific, practiced, and matched to the underlying cause.