discomfort around arm

Hope someone has found a solution that helps.

Following a mastectomy in december I have found that wearing (even soft pull on bras) causes great discomfort around my arm . I am told that the scar pushes flesh upwards and could be the problem or that it is swollen following the op and will subside in time, I have tried putting a silk scarf over the area ,that just shifts and I am trying to figure out an ideal shape to make a small padded pillow /cushion, I am disappointed that I have not been able to find any mention of solutions to this problem in any catalogues etc. I cannot be the only person to experience this , any suggestions gratefully received

In hospital I had a mastectomy and implant (silicon) and I was given a Triumph Triaction which was clear cut around my arms and armpit area.  I bought a High support bra from MandS but that comes high up into my arm pit and nearly rubs.

 

My arm swelled slightly and became very heavy, and the only comfort I could find was resting and massaging it.   Resting it on a chair arm or table.

 

Helenbythesea