Glad to read you may be getting some relief from the steroid. I don't think I've ever had a steroid that wasn't helpful in resolving whatever ailment for which it was prescribed. The long-term effects however, can be devastating as I'm sure you know. Regardless, I hope your issue resolves quickly.
After recommending combining piperine with turmeric, I wondered if the piperine wouldn't
further irritate the bladder. After all, piperine is found in black pepper. Turmeric, or more specifically curcumin, an ingredient derived from turmeric, is known for its anti-inflammatory effects and works by decreasing the chemical moderators that produce inflammation in the body. As I noted below, the piperine in black pepper boosts the absorption of curcumin. While many sources list "spicy foods" as a bladder irritant, I searched the internet but was unable to identify evidence of a link between piperine and bladder irritation. Interesting, I found a current (US) National Cancer Institute pilot phase 1 trial that "studies the side effects and best dose of curcumin when given together with piperine ... in reducing inflammation for ureteral stent-induced symptoms in patients with cancer."
To summarize, I don't know for certain if the piperine I recommended to be added to the turmeric enhances or negates the anti-inflammatory properties of curcumin in the bladder so please take my recommendation with a grain of salt, or pepper.
T. J. Moynihan, M.D. writes: "Curcumin is thought to have antioxidant properties, which means it may decrease swelling and inflammation. It's being explored as a cancer treatment in part because inflammation appears to play a role in cancer.
Laboratory and animal research suggests that curcumin may prevent cancer, slow the spread of cancer, make chemotherapy more effective and protect healthy cells from damage by radiation therapy. Curcumin is being studied for use in many types of cancer.
Studies of curcumin in people are still in the early stages. Clinical trials are underway to investigate curcumin as a way to prevent cancer in people with precancerous conditions, as a cancer treatment, and as a remedy for signs and symptoms caused by cancer treatments.
Research is ongoing, and there isn't enough evidence to recommend curcumin at this time. As always, talk with your doctor before using any herbal supplement. It's unclear how curcumin may interact with medications."
www.mayoclinic.org/diseases-conditions/cancer/expert-answers/curcumin/faq-20057858