Skin itching around full moon every month

This issue has been going on for many years and the regular allopathic doctors have no clue how to help me since my blood tests are normal and they cannot understand my problem.

Every month around full moon my condition gets worse. ( I am 65 and 10 years menopausal)

First my intestinal problems get worse. Abdominal tenderness increases and my stool gets more mucus....on occasion only a long thin, transparent worm like mass comes out from the rectum into the toilet.
( I was diagnosed with IBS few years ago) which flares up once in a while. )

But the main issue about this is that i get severe skin itching either on the top of my left foot, or on the ankle of my left foot or in the palm on my right hand.

It itches so much that the skin gets sore, becomes red and scabs form, and i have to scratch until blood comes out.
Only then the itching stops.

This goes on for about 1-2 weeks. It starts few days before the full moon and lasts for a week after

Then there is a period of rest, until it starts again next month

I also have itching in my nose and deep inside my ear. Also on the back.

NO itching in rectum, only very occasionally.

I cannot take this now any longer.