Ask Your Health Question and Get an Answer ASAP
Henoch-Schönlein purpura: usually associated with pain abdomen, arthritis, etc.
Contact dermatitis: you may have an allergy to some commonly used substance like rubber, nickel in jewelery,etc.
I hope this answer was helpful. If you need more information, feel free to ask. For accepting this answer, please click on the green 'accept' button below. Feedback/Bonus will be warmly appreciated.