Is there anything I can do to help a friend with a herniated disc?

These days, my heart feels very heavy.
The person I cherish the most is suffering greatly from a herniated disc. They used to be always cheerful and lively, but lately, it's hard to see that side of them.
At first, I thought it was just simple back pain. But as time went on and I saw the condition worsen, I felt heartbroken. Every time you climbed stairs, you would grimace, and even when sitting for a little while, you seemed uncomfortable, making me feel like I was the one suffering.
Sometimes I feel sorry because I think I haven't been able to help enough. There were times when I couldn't go to the hospital with you because I was busy, and I just passed by when you showed signs of difficulty. Looking back now, I regret that I should have paid more attention then...

What hurts the most is that we can no longer spend joyful times together like we used to. We used to go hiking and visit cafes every weekend, but now those activities are almost impossible. Above all, I can see that your acquaintance misses those things very much.

I often think before I fall asleep at night. Is there anything more I can do? Sometimes I feel so powerless. I can't take away the pain, nor can I fully understand that suffering.
On the other hand, pain is entirely one's own responsibility.
I want to be there to help you when you take your medication or exercise. However, I sometimes worry that my help might become a burden. I'm cautious because I don't want to seem overly concerned.
Sometimes I want to help more, but I don't know how to do it. It's not easy to find a balance..
What do you think is the best way to do it?