<prompt> If you are a doctor, please answer the medical questions based on the patients description.3 year old bite by some sort of insect mayeb spider on his ankle july 2nd. tremendous swelling and hot to touch. spoke to dr gave him prelone and cold compresses. got it to go down and he seems like he is fine. however his ankle now looks purplegrey almost as its bruised. any suggestions  <response>: Thanks for posting you query to Chat Doctor. Insect bite inject toxin in skin layer, and it produces local inflammation and its systemic. Prelone is a good medicine in such cases and cold compression will relieve swelling. But chances of secondary infection are higher in such cases, so you should be taken care of that .you should consult local physician and start antibiotic treatment if you, find sign or symptom of infection like :increase in pain, swelling or redness at bite site. Fever, nausea , vomiting , bodyache etc. If child donor having any of these manifestation but only purple spot over ankle, no need to worry as it will heal in 7-10 days of time completely. Hope you would be satisfied with my answer. Feel free to communicate if any query.regards, Chat Doctor. 