Thank you for posting your query through Healthcare magic.
Here in your disease condition the poison injected into your body by the ant and the reaction of your body are both significant.
You could have got cured with one out of some 62 remedies of Homoeopathy indicated for the stings of insects or from out of 43 remedies indicated for bites of poisonous animals. Since it was not cured, your body always suffered from it like a chronic poisoning
with occasional exacerbations.
The bump is the attempt of the body to contain the poison into the area affected. The horribly offensive discharge is the bye product of chronic infection with development of pus at the site.
Now also you can get it cured by approaching an expert Homoeopath. Homoeopathy cures you by improving your immunity. Once you are cured, the affection at the site of ant bite also will get cured without any more affections of itching, pain or discharges.
You are welcome to give your details to me also through the premium follow up question facility of Healthcare magic and I can help you by selecting the right constitutional remedy for you.
With Best Wishes,
Dr C. J. Varghese