Thanks for the query to H.C.M. Forum.
May be dermoid
cysts, sebaceous cyst or hematoma
due to fall of platelets count as you mentioned in your query.
When platelets decreases in number than there develops bleeding at various site.
If this bleeding is underneath skin than there become swelling and we call as lump formation.
However this hematoma like lumps resolves within a short period.
What is the reason of lowering of platelets and w b C?
Assessment of these two parameters are very important ,so consult a physician and get his opinion.
Consult surgeon for lumps.