The NHS says you may be advised to change your diet, drink plenty of sugar-free fluids, exercise more often or if you use insulin, adjust your dose.
“Until your blood sugar level is back under control, watch out for additional symptoms that could be a sign of a more serious condition,” it adds.
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You should also contact your diabetes care team immediately if you have a high blood sugar level and experience feeling or being sick, tummy (abdominal) pain and diarrhoea.
The same applies if you have rapid, deep breathing, a fever for more than 24 hours, signs of dehydration or difficulty staying awake.
Source: Daily Express