thanks for using Health Care magic .
I would be pleased to answer your question
Yes Blood clots
can occur in very severe cases of varicosities .
If there is an pain burning and swelling and redness and pain on pressing that area one needs to rule out cellulitis
, deep vein thrombosis
, erysipelas and other complications .
You can visit a Dermatologist
or a Casualty medical officer.
Thanks and take Care