Hi.. Thanks for the query. I have gone through your query and can understand your concern.. As per your complain a small blood clot or Hematoma at the site of tongue piercing can be due to rupture or piercing of a small blood vessel while piercing and leads to accumulation of blood in soft tissues leading to formation of a small hematoma.. Nothing to worry as it will resolve soon.. I would suggest you to do alternate warm and cool compresses over the lump.. Take anti-inflammatory painkiller like Motrin or Aleve for reducing swelling from tongue and pain if any.. Take a soft diet and plenty of fluids to avoid any injury to the area.. Maintain a good oral hygiene to prevent infection.. Hope this information helps.. Thanks and regards. Dr.Honey Nandwani Arora.