The NHS says: “A low blood sugar level can affect everyone differently. You’ll learn how it makes you feel, although your symptoms may change over time.”
It notes that early signs of a low blood sugar level include sweating, feeling tired, dizziness, feeling hungry, tingling lips, feeling shaky or trembling, a fast or pounding heartbeat (palpitations), becoming easily irritated, tearful, anxious or moody and turning pale.
It notes: “If a low blood sugar level is not treated, you may get other symptoms”.
These can include weakness, blurred vision, confusion or difficulty concentrating, unusual behaviour, slurred speech or clumsiness, feeling sleepy, seizures or fits and collapsing or passing out.