10 Facts About Nails Every Nail Tech Should Know
By Nail Tech Success Team
Knowledge Is Your Superpower
Anyone can do a decent set of nails. But the nail techs who build lasting, loyal client bases? They understand why things work the way they do.
Knowing the science behind nails doesn't just make you better at your job — it makes you more confident, more professional, and more able to explain things to clients in a way that builds trust.
Here are 10 nail facts worth knowing.
1. Nails Grow Faster in Summer
Nail growth increases in warmer months due to improved circulation. On average, fingernails grow about 3–3.5mm per month, but this slows in winter and with age. Knowing this helps you advise clients on realistic infill timescales throughout the year.
2. Dominant Hand Nails Grow Faster
Your dominant hand nails grow slightly faster than the non-dominant hand — thought to be due to increased blood flow from more frequent use. This is useful context when one hand seems to need infills sooner than the other.
3. The Nail Plate Is Dead — But What Surrounds It Isn't
The nail plate itself is made of dead keratinised cells, which is why cutting nails doesn't hurt. But the nail bed, matrix, and surrounding skin are very much alive — and vulnerable to damage from improper prep, filing, or product application.
This is why technique matters so much. It's not just about aesthetics — it's about protecting living tissue.
4. The Nail Matrix Determines Everything
The nail matrix — the tissue beneath the base of the nail — is where new nail cells are produced. Any damage to the matrix (from trauma, aggressive cuticle work, or illness) can permanently affect nail growth and shape.
Understanding the matrix is foundational to safe, professional nail care.
5. Gel Polish Works by Photoinitiators
When gel polish cures under a UV or LED lamp, it's photoinitiators in the formula that react to light and trigger the curing (polymerisation) process. This is why gel stays sticky and doesn't set without the right lamp — and why using mismatched lamps or insufficient cure time leads to uncured product and potential sensitisation.
Chemical knowledge like this is covered in depth at Rebecca Orme's online nail academy at academy.rebeccaorme.co.uk — essential education for any tech who wants to understand what's actually happening with the products they use every day.
6. HEMA Is a Common Sensitiser — But It's Not the Whole Story
HEMA (2-Hydroxyethyl methacrylate) has become well-known as an allergen in the nail industry. However, sensitisation usually occurs when product is left on the skin or improperly cured — not simply from using HEMA-containing products correctly.
The TPO ban (on a specific photoinitiator) and the broader conversation around HEMA and Di-HEMA are complex topics that every professional nail tech should understand. The academy at academy.rebeccaorme.co.uk breaks this down clearly — including what it means for the products you use and how to protect yourself and your clients.
7. Nails Are a Window to Overall Health
Changes in nail colour, texture, shape, or growth can indicate systemic health conditions — from anaemia and thyroid issues to psoriasis and diabetes. Techs who know what to look for can gently flag concerns to clients and refer them to a GP when appropriate.
This isn't about diagnosing — it's about being informed enough to notice and respond professionally.
8. Dehydration Affects Adhesion
Oily or moist nail plates are one of the most common causes of lifting. Proper prep — including dehydrating the nail plate before applying any product — is non-negotiable for lasting results.
Skipping prep doesn't just cause lifting. It can also trap moisture and bacteria beneath the product, creating conditions for infection.
9. The "White Part" of the Nail Isn't Always the Free Edge
The lunula — the pale, half-moon shape at the base of some nails — is the visible part of the nail matrix. It appears white because the matrix cells haven't fully keratinised yet. Not all clients have a visible lunula, which is completely normal.
Understanding nail anatomy helps you explain what you're seeing to clients and reinforces your professional credibility.
10. Nail Thickness Varies — and Matters
Nail plate thickness varies significantly between clients and affects how products adhere, how long enhancements last, and how much filing is safe. Thin, damaged nails need a very different approach than thick, healthy ones.
Assessing nail health before every appointment isn't just good practice — it's how you build a reputation for work that lasts.
Learn More Than Just Technique
The best nail techs aren't just skilled with their hands — they understand the science behind what they do. That knowledge protects their clients, protects themselves, and builds a business reputation that lasts.
If you're ready to go deeper on nail education — chemistry, anatomy, application science, and more — Rebecca Orme's nail academy at academy.rebeccaorme.co.uk is built exactly for this.
And if you want to combine world-class education with the business tools to make it pay — the Nail Tech Success Planner + Academy Bundle gives you everything in one place.