Can psoriasis be hereditary?

Yes. 70 per chet of patients with psoriasis have a family member with psoriasis. It can be a parent, sibling or grandparent.
Yes. 70 per cent of the time there is a family history of psoriasis.It can be very limited as such as thickening of the skin on the knees and elbows or minor changes in the nails called pitting.