What should you know about the latest hair removal machine?

Alexandrite, diode, and Nd:YAG systems use different wavelengths. That changes how deeply energy travels and how strongly it is absorbed by skin pigment and hair pigment. A cooling tip or cooling spray may make the treatment more comfortable and protect the surface of the skin. Most devices work best when hair has visible pigment; very light, grey, or red hair may respond less predictably.

Laser hair removal reduces growth over a course of appointments because hairs cycle through active and resting phases. It does not treat every follicle at once. Device settings also need adjustment for recently tanned skin, darker skin tones, sensitive areas, and medicines that increase light sensitivity.

Ask for a skin and hair assessment before booking. Tell the clinician about tanning, pigment changes, medicines, cold sores, scars, and any history of dark marks after irritation. Follow the clinic's shaving and sun-avoidance instructions, and do not wax or pluck the target hair when the plan relies on the follicle being present.

A patch test can help the clinician judge how your skin responds before treating a larger area. If shaving causes [Ingrown Hairs](/symptoms/ingrown-hairs/), discuss whether treatment might reduce that problem. For facial or hormonal hair growth, [Hirsutism](/conditions/hirsutism/) may need assessment alongside hair removal.

Contact the treating clinic if redness becomes increasingly painful, blisters appear, the skin develops marked swelling, or a dark or pale patch continues to change after the expected settling period. Seek urgent help for facial swelling, widespread hives, breathing difficulty, or faintness.

Persistent bumps, draining areas, or recurrent painful lumps deserve medical review rather than repeated home treatments. Conditions such as [Razor Bumps](/conditions/pseudofolliculitis-barbae/) and [Hidradenitis Suppurativa](/conditions/hidradenitis-suppurativa/) need a different plan.

Which wavelength suits my skin tone and hair colour? What cooling method and test spot will you use? How should I prepare, and which symptoms after treatment should prompt a review?