Systemic
mastocytosis, the collection of mast cells in the skin, lymph nodes, liver, spleen, gastrointestinal tract,
and bones.
Mastocytoma usually occurs in childhood and clears-up on its own. Urticaria pigmentosa (present alone without systemic disease) also dramatically clears or improves as adolescence approaches.
There is no known treatment that decreases the number of mast cells within tissue.
ref:http://www.myonlinewellness.