Hello, thanks for the query to H.C.M.C.
Hot to touch i.e. the temp of that part is somewhat increased than other part of body.
It was due to infection or some allergy
but there was no itch so might be a case of some infection.
You were on Co codemol for temporary arthritis.
is due to infection in throat in which there is cold and flu like symptom present.
are the bacteria which from throat enter into blood and reaches to joints and lately in heart.
Your's wrist and knee joints also hurt , a sign of involvement of joints.
So please get in blood examination and blood culture
to rule out streptococcus or any pathogens in above sample.
R A factor for rheumatoid arthritis
must be checked at this stage.
Consult a physician and have treatment accordingly.
GET WELL SOON.