Hi Tanja, Thanks for using HCM.Parvovirus
B19 usually presents with erythema
and also arthritis
in adults. Pain at joints wont progress and can be relieved by analgesics(NSAID). No need to cencerned for this. But constant neck and upperback pain may be due to disc or spinal nerve
compression or musculo skeletal pain. Take analgesic with muscle relaxant
and mild stretching exercises every day and reduce your weight. This may relieve your pain, if not then consult your doctor for examination and management.
Hope I answered your question. Feel free to ask me if you have any further queries.
Wish you good health. Take care.