Hi, thanks for sharing your health concerns with HCM!
Well, If I were your treating Doctor for this case of painful back of neck nodule/lump, I would come up with three possibilities, these include:
1. enlarged
lymph nodes due to some acute inflammation in surrounding region like head neck or axilla! there is nothing to worry about this!
2. The second possibility is of benign and inflammatory conditions like small boil or folliculitis; there is nothing to worry about these!
3. The last possibility is of some inflamed sebaceous
cyst !
In worse cases these could be
tuberculosis or even lymphoma!
Overall, there is nothing to worry as per your description in present case. Press ice/
cold compress and avoid poking it and write to us after 2/3 days!
I suggest you to go for an FNAC and
ultrasound of the lump for confirmation if you are still not convinced, and to relieve your concerns!
Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions.
Wishing you good health.