Diary deemed unhealthy

According New Scientist article Dear diary, you make me sick:

Keeping a diary is bad for your health, say UK psychologists. They found that regular diarists were more likely than non-diarists to suffer from headaches, sleeplessness, digestive problems and social awkwardness.

Although she does not have proof, Duncan speculates that diarists buck the usual trend because instead of a single, cathartic outpouring to offload trauma, diarists continually churn over their misfortunes and so never get over them. ?��Ǩ?�It?��Ǩ�Ѣs probably better not to get caught in a ruminative, repetitive cycle,?��Ǩ�� she says.

But the results are not at all conclusive:

But she acknowledges that her experiment could not demonstrate which came first - the diary writing or the health problems.