How does your self-image compare to the evidence?

No. This is an educational tool built on population survey data rather than a clinical assessment. The research underneath it, Cash et al. 2004 and Epley and Whitchurch 2008, is peer-reviewed, and the tool itself substitutes for professional support in no way at all. If body image concerns are affecting your quality of life, a qualified therapist or your GP is the place to start.

Several mechanisms stack on top of each other. You see your own face in mirrors and reversed photographs, which is not the face anybody else sees, so the reference image is wrong before you start. Social comparison also runs upward, with people measuring themselves against those they judge more attractive rather than against the average. And repeated exposure to idealised media appearances lifts that reference point higher again. Epley and Whitchurch (2008) found the automatic side of self-recognition runs flattering, tied to implicit self-worth rather than to what people report, so any self-doubt sits in the conscious layer rather than the automatic one.

Yes, and mostly at work. Hamermesh and Biddle (1994) found plain-looking workers earned 5 to 10% less than average-looking ones after controlling for other factors, a penalty slightly larger than the premium for good looks, an effect running partly through implicit bias in hiring and performance evaluation and partly through the confidence that accumulates over years of positive appearance feedback. The effects came out slightly larger for men than for women. In relationships the effect sizes are far smaller than people expect, and personality, communication style and social skills all outperform physical attractiveness as predictors of relationship satisfaction.

Weight and muscle tone, in both sexes, on Cash et al. (2004) data, though the specifics split by sex. Women reported more dissatisfaction with weight, stomach, hips and thighs. Men reported more with muscle tone, weight and height. Facial features scored moderate. Height, which nobody can do anything about, produced less distress than weight did, which suggests people resent most what they believe they could change. Population context for height specifically is in the height percentile calculator.

Not in a straight line. Cash et al. (2004) followed US college students from 1983 to 2001 and found women's dissatisfaction rising until the early or mid-1990s, then improving despite heavier body weights, while men's stayed fairly stable. Mental Health Foundation data from 2019 and other UK surveys suggest the concerns are still widespread and may have intensified again with social media and filtered imagery behind them. Body-positive cultural movements may be tempering some of that in younger cohorts, though the research on it is still running.

They agree less closely than people expect, and the direction isn't simple. Epley and Whitchurch (2008) found people pick an attractively enhanced photo of themselves as the real one, which points to a flattering automatic self-image, and that bias tracked implicit self-worth rather than what people said about themselves. This page doesn't quote a single figure for the gap between self and peer ratings, because none of its sources measures it.

Modestly, yes, and it improves despite the physical changes running the other way. What shifts is how much weight people give appearance against everything else they value, along with a fall in upward social comparison as social circles settle. Cash's longitudinal research found body image is predicted better by psychological variables, particularly how far somebody invests appearance with their sense of self-worth, than by any objective physical measurement. People who rate their quality of life highly rate their appearance more highly too, whatever they actually look like.

BDD is a clinical condition, an obsessive preoccupation with a perceived physical flaw that outside observers see as minimal or do not see at all. What separates it from ordinary body dissatisfaction is intensity, resistance to reassurance and interference with daily functioning. It affects about 2% of adults in the community, on Veale and colleagues' 2016 review, with women outnumbering men in most settings, though the focus of concern differs by sex. Ordinary body dissatisfaction is widespread and worth addressing, sits below any clinical threshold, and usually responds to cognitive reframing and cutting back on social comparison. Appearance concerns that are causing real distress or avoidance behaviour belong with a mental health professional who can assess whether BDD criteria are met.