Dangerously low (hypoglycaemia) or high (hyperglycaemia) blood glucose can become an emergency. Exact numbers vary by device and individual targets. If someone with diabetes is confused, fitting, unconscious, or breathing with ketones/vomiting, seek urgent help — call 999. Use GP Carely for non-emergency follow-up questions only.
Low blood sugar (hypo)
Sweating, shaking, hunger, confusion or irritability can signal a hypo. Treat promptly with fast-acting carbohydrate if the person is conscious and able to swallow, following diabetes care plans. Unconsciousness is an emergency.
High blood sugar (hyper)
Thirst, frequent urination, tiredness and blurred vision can occur with highs. Very high readings with vomiting, abdominal pain or rapid breathing may indicate DKA or HHS — emergency care.
Frequently Asked Questions
What number is dangerous?
Targets differ. Follow your diabetes team’s ranges. Symptoms and context matter as much as a single reading.
Medical notice: online GP care does not replace emergencies — call 999 for life-threatening symptoms. Clinical documents are only issued after a professional consultation. Policies, doctor profiles, privacy and terms are available on this site.
GP Carely — www.gpcarely.com — UK telemedicine platform connecting patients with GMC-registered GPs.