Hello Techninot,
With respect to other commenters, may I urge you to address your playing technique with a well-trained instructor who teaches a conventional approach to playing.
When I played (before a slicing nerve injury of the thumb of the pick hand), I had never had any difficulty with inflammation except once when departing from playing in a conventional manner, briefly experimenting with a twisting forearm movement. However, I surmise improper technique that causes strain of any sort may also produce inflammation that is not suppose to ever occur at any juncture in playing, as a beginner or otherwise.
Even growing up, those I played with then in our teens were sound in pick-hand technique; no physical issues occurred and no one did special exercises. (My formally educated instructor never employed physical exercises; there wasn't any need because there was no stress whatsoever placed on the arm/hand while using proper technique.)
I would ask of you to consider the similarities in the following musicians known for their technical proficiency and compare their playing to your approach, in terms of any forearm twisting on your part or other playing oddities in form. Les Paul & Jeff Beck:
YouTube. Please note that nothing of the forearm is involved in their playing.
I think it fair to say that a conventional technique evolved that not only allowed for desirable tonal production and consistency in accuracy but also did not cause inflammation or strain. Years before Les Paul was playing duets with his wife in the 50's Jazz, Swing, Big Band guitarists commonly used the elements of a conventional technique that present day can be seen used by many long-standing renowned guitarists in various genres--proper technique translates across styles.
Of essential message, however, please do not try to play through the pain in an effort to overcome strain by somehow building up ligaments that aren't suppose to be used in playing: It is not a natural occurrence with guitar players. (Again, I believe that proper training can help you in this matter unless there is some other physical activity that is causing the issue or both.)
Best of health in contributing joy and peace and understanding to those your music touches--JeffF.
To forum members and visitors, I placed the YouTube link in my post but the video came up in the text. It was such a great shot of two great players of different generations I hope no one minds, rather enjoys. If visiting or not logged in, simply click on the title at the top of the video and it will open the YouTube video, or login and click on the video to play.