is the ridges you feel like blisters?
Dermal ridges are the surface ridges of the skin of the palms and soles, where the sweat pores open.
Outer layer of the skin where fingerprint ridges are found. Also know as Epidermis
Dermal Papillae
The hard ridges of the skin created a design around the dinosaur's eyes. The top of the ridges marched across the horizon as far as they could see.
friction ridges
dermal papillae
They are called ridges. The characteristics have names: ridge endings, bifurcations, dots and maridge shape variances.
Marcello Malpighi
to grip with you couldn't hold on to nothing with slick fingers
Epidermal Ridges
Mid-Ocean Ridges forms where a continental plate slides under an oceanic plate. I hope this is what your looking for ! ! !:D