I had done 6 sessions of SHR laser & now I switched to DIODE Laser (2 other sessions), why haven't I seen great results ?

With these symptoms seek care because this is not normal reaction .Until you see doctor wash with soap and water and apply aquaphor.

Typically lasers will not fire if the gauge is not set properly.  Otherwise it typically has very little effect on the delivery of the device. More information is needed.  Best, Dr. Emer.

Thanks for your question and voicing your laser hair removal concerns. It’s very unlikely that the heavy/tired feeling in your underarm was caused by your laser hair removal treatment. If the feeling mostly occurred shortly after your treatment, it could have resulted from blood flow returning t...

I am so sorry for your issue.  Pigmentation may return after a year or so.  There is a possibility that this may be permanent.  

I agree with Dr. Johns that it is difficult to say without a picture.  In my opinion and experience it may represent hyperpigmentation after your treatment.  Hydroquinone and /or kojic acid may be helpful.

The laser tip would have to be reused from someone who had warts, touch the warts and be able to resist the laser energy.Applicator tips are changed and the hair lasers can be used to even renove warts .Discuss your concerns with doctor but you should not worry.