Site in hair bearing area most common in the scalp and face .not found in the palms and soles
Size
Shape (spherical in shape)
Surface
Punctum found in 50% of the cases
Surgical scars
Dilated veins
ask first about site of tenderness
Tenderness
Temperature
Constancy (Soft or cystic)
Surface smooth
Edges(well defined)
Fixed to skin but not to underling structures
Cross Fluctuation is +ve
Examine the draining lymph node