Vira Simhavaloka · by Virasimha
Chapter 64 · Galaganda and Gandamala and Raktarbuda: past deeds
गलगंड-गंडमाला-रक्तार्बुद — कर्मविपाकः
इतिवचनात् । तस्माच्छंदऋषिदैवतानि ज्ञात्वैव जपेत् । एतच्चाधीतब्राह्मणविषयम् । कृच्छ्रचांद्रायणब्रह्मभोज्यानि च कारयेत् । अभक्ष्यभक्षी चैव ।
So the saying goes. So he should repeat it only after knowing the metre, seer and god. This is for a priest who has studied the Veda. He should also have krichchhra (penance fast), chandrayana (moon-phase fast) and a feast for priests done. The same holds for one who eats forbidden food.
Classical view, not medical advice.
अथार्बुदरोगस्य कर्मविपाकहेतुमाह तत्प्रतीकारंच । पूर्वजन्मनि विधवया सार्द्धं रममाणः रक्तार्बुदवान्भवति ।
Next, the text gives the cause of tumour illness from past deeds, and its remedy. In a past life, one who lay with a widow may get a blood tumour.
विधवागमने नित्यं नरो रक्तार्बुदी भवेत् ।
A man who keeps going to a widow may get a blood tumour.
इति नारदीयवचनात् ।
So says the Naradiya text.