Welcome to HealthcareMagic forum,
I would just brief you with the two conditions (pityriasis rosea
)so that you can correlate your problem .
In PR, one gets a herald patch or a mother patch some where near neck.It is bigger than the other patches.One gets multiple patches on whole back in a Christmas tree like pattern.These patches have peripheral scales with central clearing.Mostly these are associated with sore throat
or a viral infection.Itching may or may not be present.And it takes long time to go(few months).Treatment consists of steroid
and anti histaminics.
In scabies ,one gets sever itching mostly at night with rashes over finger web spaces ,lower part of abdomen,penis and thighs.Your close contact like family members or friends might also complain of similar symptoms as this condition is contagious.Treatment consists of application of anti scabetic cream locally at night below neck.It is very important to wash all your clothes in warm water ,so as to eradicate mites from clothes as well.
So,if you can describe me your symptoms and lesions ,i can guide you with a diagnosis.