Derma Roller is similar to micro needling (Micro needling is automated, derma roller is manual)
The procedure Needle rollers can be rolled over any part of the body including the head with the exception of the eye region,  in a series of lines, grid patterned to penetrating the scalp or skin by between 0.5mm and no more than 2-4mm on the body. If a patient finds this uncomfortable an anaesthetic cream can be applied first, though generally this is not needed.
Treatments take up to 30minutes each time. Number of Dermaroller or micro-needling treatments a patient needs will depend on the problem to be addressed, how quickly the issue is resolved and result delivery. Initially a patient may need one treatment every 3 weeks for 1-2 months, then once monthly for 3 months, then maintenance treatments every 3-6 months. On average, most people need 3 initial treatments then maintenance treatments once or twice a year.

Side effect:

Dermaroller treatment is considered safe, although a patient may get some mild bruising at the treated site may occur, however this will fade after 12-36 hours.

Rarely some patients have had an allergic reaction to their own blood or the products used.

Most people can have Dermaroller, except pregnant women and people taking warfarin (Precautions).

Patients who take aspirin or clopidogrel regularly are advised to stop these 1-3 days prior to treatment to minimise bruising (risk of bruising and bleeding).

Patients using retinoid creams are advised to stop 3-4 days before treatment. It is also advisable to delay any laser or electrolysis treatments for a week after Dermaroller. Men may wish to avoid shaving on the day of treatment.

TREATMENT: 

Procedure Duration: 30 Minutes estimated

Pain Rating : Minimal estimated

Anaesthetic: None required is usually required. For lower pain threshold, topical anaesthetics may be applied

Results: 24hrs

Side effects: minimal bruising, swelling, redness, anaphylaxis, allergy *