Hi there...the history you have given is very little. What kind of a nodes are you getting? Skin colored or black colored? Soft or firm or hard in consistency? Any discharge of pus, serous or blood discharge when they degrade? Exact location of the lesions will also matter as it can resemble many diseases. The lesions you are getting will require detailed clinical examination and further tests, probably skin biopsy. So kindly consult a dermatologist for further evaluation.