
What Causes Rashes On Arms, Chest And Upper Back When On Methotrexate?

Photosensitivity; Sun protection and topical steroid cream
Detailed Answer:
Hello. Thank you for writing to us
I have gone through your query in detail and I have understood your concern.
The red rash seems to be a result of "photosensitivity", which is one of the side effects of methotrexate.
Distribution of rash on exposed body sites like upper arms, chest and upper back also goes in favor of photosensitivity.
Though, rash on inside of legs does not entirely conform with a photosensitivity distribution.
In addition to sun protection I suggest that you use a broad spectrum sunscreen with spf 50 or more, throughout the day.
Reapply sunscreen every 2-3 hours specially if you are moving outdoors.
I would like to substitute tacrolimus ointment with one of the topical steroid based cream e.g either mometasone furoate 0.1% Or clobetasol propionate 0.05% Or triamcinolone acetonide 0.1% Or betamethasone valerate 0.1% cream.
Tacrolimus ointment itself can cause a burning sensation or a slight smarting feeling on application. It may be discontinued.
You may continue with prednisone.
Regards

Answered by

Get personalised answers from verified doctor in minutes across 80+ specialties
