What harm does Ziweixing physiotherapy instrument do to the body after use?

I have used this instrument for 14 years, and the white blood cells have not decreased, but this physiotherapy instrument is only a health care instrument, and its function is only to treat the symptoms. I often use it for 30 minutes when the joints are painful, which will really relieve the symptoms quickly, but it is precisely because of this that I delayed the best opportunity to cure the root cause: because these painful joints stopped hurting after physical therapy, I stopped paying attention, and then these pains became more and more serious, and it was useless to do anything else. I just rushed to the hospital to see them, but I was seriously ill. Advise friends, if you are really sick, you must go to the hospital for formal treatment, never mind, never believe the seller's exaggerated propaganda.