Hello and Welcome to ‘Ask A Doctor’ service.
I have reviewed your query and here is my advice.
My thoughts and suggestions are as below.
Recurrent lumps in the armpit in spite of surgery indicates one of the following:
Seborrhoeic Dermatitis.
Hidradenitis suppurativa.
Hence the management is as follows:
Prevention is better than cure:
Clean the area with plain water at least 3 - 4 time and keep it dry.
Apply Liquid
Povidone Iodine locally.
Use loose clothes to keep the area aerated.
No local powder or ointment.
Take multivitamins and mineral supplements.
Avoid hot and humid atmosphere.
Antibiotics and anti-inflammatory medications if needed.
Hope I have answered your query.
Let me know if I can assist you further.