Low blood sugar, or hypoglycemia, can cause a variety of symptoms. Some common signs of low blood sugar include:

• Feeling shaky
• Sweating
• Fast heartbeat
• Dizziness or lightheadedness
• Hunger or nausea
• Irritability or confusion
• Difficulty concentrating
• Tingling or numbness of the lips, tongue, or cheek
• Pale skin
• Fatigue
• Anxiety
• Headache
• Blurry vision
• Seizures or unconsciousness in severe cases

It's important to note that symptoms can vary from person to person, and some individuals may not experience any noticeable symptoms, a condition known as hypoglycemia unawareness. If you have diabetes and experience symptoms of low blood sugar, it's essential to check your blood sugar levels and take appropriate steps to treat it.