Hi there Rumesh.
This problem of 8 mths needs to be looked at by a dermatologist
on the ground.
From your description & history, it appears to be some sort of contact dermatitis
or frictional induced problem due to the excessive use of your laptop.
It may require a local skin or excision biopsy
which can only be decided upon visualising the area.
It can easily be done in the Outpatient under local anaesthesia & charges would vary with the facility.
Do hope this advice has pointed you in the direction of an informed deciscion. Cheers & good luck. Here's to a clear skin!!
Dr Praveen Rodrigues MD
Dermatologist, Cosmetologist, Venereologist
Vikram Hospital, Bangalore, India