If you’ve ever wondered why dentists numb your gums before a filling or why doctors apply cream for a minor burn, the answer is often lignocaine. Also known as lidocaine, it’s a fast‑acting local anesthetic that blocks nerve signals so you don’t feel pain.
In everyday life you’ll see it in injections, topical gels, sprays and even some over‑the‑counter products for insect bites. Knowing the basics can help you decide when it’s appropriate and how to avoid common pitfalls.
Lignocaine stops pain by stabilising the nerve cell membrane. It plugs the tiny pores (sodium channels) that let electrical signals travel along nerves. When those signals can’t move, you don’t feel the sharp or throbbing sensations a wound would normally send to your brain.
The effect kicks in within minutes and lasts anywhere from 30 minutes to several hours, depending on how it’s applied. A injection near a nerve will numb a larger area for longer than a cream rubbed onto skin.
Using lignocaine is generally safe when you follow the dosage instructions on the label or from your health professional. For topical gels, a thin layer is enough – spreading it thicker won’t make it work faster and can increase irritation.
If you get an injection, the doctor will calculate the dose based on your weight. Over‑dosing can cause dizziness, ringing in the ears, or even a rapid heartbeat. Those symptoms are rare but signal that you need medical help right away.
Typical side effects include mild redness, tingling or a temporary burning feeling where it’s applied. If you notice swelling, rash, or trouble breathing, stop using it and call a doctor – those could be signs of an allergic reaction.
A practical tip: never mix lignocaine with alcohol‑based products unless the label says it’s okay. Alcohol can boost absorption and raise the risk of side effects.
When buying over‑the‑counter lignocaine creams or gels, check the concentration. Products for minor skin irritation usually contain 2–5% lignocaine; higher percentages are meant for professional use only.
Remember to keep it out of reach of children and store it in a cool, dry place. If you’re pregnant or nursing, ask your pharmacist whether lignocaine is safe for your situation – most experts say occasional topical use is fine, but injections need a doctor’s go‑ahead.
In summary, lignocaine is a handy tool for quick pain relief when used correctly. Whether you need a numbing shot before a dental procedure or a cream for a painful insect bite, following the dosage guidelines and watching for side effects will keep you safe and comfortable.
