Thanks for your query.
You have not mentioned the site of swollen glands. If they are painful, it suggests bacterial infection which has entered the skin through the abrasions. Muscle pain
may be due to the infection.
The rashes/bruises may be due to allergic reaction
to either oral drugs or injectable drugs.
Consult your treating doctor who will evaluate you and prescribe appropriate treatment for infection; and, switch over to alternative drugs/injections for the other problem.
Hope you are satisfied with the answer.
Dr. Rakesh Karanwal