Itching After Having Lipo and Fat Transfer?

A new scar can be red and itchy so it is not unusual. You can try ice on the scar and, if it bothers you, say at night when you are sleeping, maybe an anti-histamine, such as benadryl may help.

after surgery.  This is because any sensory nerves that  were stretched or bruised during surgery often give off low level pain signals which you interpret as itching as they begin to recover.   However, you mention that the incisions are getting darker and itching.  Taking benadryl may help, but talk to your doctor about any possible problems with your incisions and stop putting anything besides plain vaseline on them.  Sometimes itching in incisions may be a sign of keloid or hypertrophic scar formation.  Also, you wish to avoid darkening of the scars, or hyperpigmentation, which is common in anyone who has more pigment in their skin.  This is because darker scars are more noticeable.  Talk to your surgeon and good luck with your recovery.

There is nothing pathological about itching after having any surgery including liposuction and fat transfer. It is simply a response by release of histamines in a healing wound that causes the itching sensation and in most cases is a sign of normal healing process without infection.