Welcome in H.C.M.
I have gone through your query regarding itching and little bumps and red linings over itching sites .
This story if symptoms favors for allergic phenomenon and urticaria
You should investigate yourself for-
1- Stool test
for ova and cyst
2- Skin test for allergy
3- To find out any other allergic disorder in your body.
Till diagnosis is made you may take anti allergic for immediate relief.