Got a insect bite which is years old, now its just a painfree bump with a hole, timely it gets fulfilled with black substance (not liquid) but the substance has bad odour, just afraid it might become something worse.

Dr. Krishnan Nair M PGeneral Physician47yrs exp

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Many insects-- like acid fly-- have severe poison in it's saliva and body fluids --- by bite or squeezing inadvertently-- when it crawls over the skin --the insect's body fluids can come in contact with us ///.one have to wash the bitten or insect--crushed area immediately with soap and water for 10 minutes-- to get rid of this poison and take out the horn of insect with out breaking---//or else depending on the type of insect ; its type of contact ; etc one may get inflamation and sometimes distruction of tissue locally// or it may spread to adjascent areas causing spread of inflamation and tissue distruction// or generalised reactions ./// when inflamation and superadded infection are localised --it may develop-- like a cyst -as in your case---- the micro organisms harboured inside may become dormant by itself or by treatment -///-and then it may produce further chronic inflamation or seasonal pus formation--- when the person is exposed to extreme cold /hot climatic or other environmental hazards or// his immunity weakens -due to some causes like malnutrition ; other infections etc-- -immediate treatment by a dermatologist // consultant physician with local and systemic antihistamines ; analgesics; antibiotics ; anti inflamatory drugs etc ---as per the symptoms and signs is most important. Thank you so much for asking this most important question ---this discussion will help many people--- as many are suffering with serious side-effects --due to ignorance of these facts.  

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