DIABETIC DOCTOR NEAR TO ME PLEASE TAKE CARE OF YOUR HEALTH Causes and risk factors of hyperglycemia (high blood glucose ) There are a host of reasons a person might develop hyperglycemia ( high blood glucose ) . for someone who has diabetes , it could be a problem with their treatment or management plan. In case of an otherwise healthy person , lifestyle factors such as weight gain , too little activity , or smoking could play a role in bumping up blood sugar levels . Pregnancy can also be a risk factor . And everyone experiences increases in blood sugar levels during the early morning