Hi,
Welcome to health care magic,
Thank you for the query.
Your History and description suggests that you may be suffering from
Pityriasis rosea, which is a scaly
skin rash caused by Herpes virus and sometimes the cause is unknown and it is not contagious. It does not seem to be bitten by leech.
However,It has to be confirmed, kindly get yourself examined by a Dermatologist so that he/she may examine you and suggest a blood work and biopsy to rule out other causes with similar symptoms.
Once confirmed you will be treated accordingly with
Antiviral medications and
Phototherapy if the symptoms worsen.
However, it may be better if you can send across a picture of the lesion,so that so that I can answer your queries better.
Follow these instructions to get some relief.
1) Use lukewarm water when you shower or bathe, because it is less irritating.
2) If you have itching, use calamine lotion.
3) take antihistamines like cetrizine available over the counter and go for regular follow up.
Consult dermatologist for complete examination and treatment.
Wish you Good Health.
Regards,