Your skin condition might be Hypertrophic Lichen planus
, An inflammatory skin disease, or others.
I am sure it has no relation with the pathetic incidence of your mother.
But i like to suggest you to visit a dermatologist
You need a skin biopsy
for histopathology, a surgical procedure, to confirm your diagnosis.
I hope that this confirmation will give you some mental relief.
I am looking forward to your report.