I'm not sure. There is some controversy in the dermatology community about whether the rapid onset of seborrheic keratoses (the spots I assume you're describing) means anything or not. However, I'm not aware of any connection, even theoretical, with DVT (deep vein thrombosis.)
My advice is to consult a dermatologist for evaluation and perhaps biopsy if there's any ambiguity regarding diagnosis.
Best.
Dr. Rockoff
Dr. Rockoff