Two things are possible. Either you have scabies
or you are suffering from fungal infection
. It is very common that in both conditions there is severe itching
. After scratching the area it is common to develop scars
and with excessive itching there is serous discharge from the spots. It is common after using your hands for scratching you spread the infection to other areas which you touch.
To start with have good hygiene in the areas of itching.
Use tab. Certrizine once in 24hours to control itching.
Visit a dermatologist
to have the exact cause of itching which he will know after examining the area and possible slide test to rule out the fungal infection. After having the right etiology he will prescribe you the appropriiate treatment and your itching will be cured.