Hello,
Welcome to HCM,
The rashes on the foot , palm, forearm and the
scalp is may be due to
eczema,
allergy or infection.
The cause for the rashes and swelling should be found out.
With this medical history i can suspect allergy, irritation or any infection all these can present with the symptoms you are having.
I would suggest you to take an opinion of your
dermatologist.
Thank you.