hi. i am 24 years old, and i have this hyperthyroidism since 4 years. Earlier before the treatmnt i had troubles with my menstruations as it took quite long time like 3-4 months to happen.... as per the doctor's prescription i take medcine Eltroxin (levothyroxine sodium) 100 mg everyday, and since then my periods are normal... but recently since past 3 months i found some dark green spots just at the right side of my neck below the jaw, which eentually turned to get darker and from 1 spot it got increased to 3-4 spots in the same area. it itchs me from inside the skin and have also started giving me pain as it stresses my skin too. i would like you to help me understand what am i going through (name of the disease) and plz suggest me the best solution to overcome it....