We all get lumps and bumps during our lifespan. The gray, rough bump could be simply skin cells, but, any change in skin coloring, rough spots on skin, silvery to gray or red spots on the skin should be looked at by a specialist for diagnosis.Most of the time it's not cancerous and if it should be early detection is almost always curable.
a small grayish bird
small rough
If they have a white-ish cap on top yes. It could also be an ingrown hair or a blister.
carcinoma in situ
herbie
What you are seeing is dandruff
Ribosomes are small "bumps" located on the rough endoplasmic reticulum.
round , rough, small
Stage IA: Very small cancerous area that is visible only with a microscope
the presence of ribosomes Many small ribosomes are attached to the surfaces of the rough ER. The rough ER processes proteins made by the ribosomes.
Common sage is a small evergreen subshrub, with woody stems, grayish leaves, and blue to purplish flowers. It is native to the Mediterranean region.
Most are smooth if you run your fingers from head to tail. Some do have some small rough textures though.