Acute Hyper Healing gives a mutant the ability to mentally control his own biology, on a cellular level. With concentration, the mutant can heal four-times the normal rate. He will also be free from physical pain and fatigue for up to 24 hours. This power may be used once per week.
With cybernetic implants, medical nanites (microscopic robots) can direct natural healing, control pain and discomfort, and provide stimulants, as noted above. For androids, nanites and specialized auto-repair systems would allow a it to control its own internal mechanisms.