Sounds like the main pipe is clogged. That's the big drain pipe that all three (toilet, shower, sink) are hooked too. When you plunge the tiolet it pushes back up the shower and sink instead of going down the clogged main pipe. The main pipe might need to be roto-rootered out. You could try some super heavy duty, pour in drain cleaner first. It might work.
Water won't drain from shower. Either trap or shower drain line is clogged.
Installing a steam shower in the basement is not a good idea. The steam shower should be installed in the nbathroom of your home.
Check you vent stack connection inside the house. Gurgling may have been caused by a clogged vent stack not equalizing the pressure. Now that gurgling has stopped it is getting air. Start your checking there. ----HYPOTESIS The shower drain in a spare bath gurgled when the toliet flushed or the sink water drained When the shower was used it leaked to the ceiling below. Now it does not gurgle -How do we find the leak?
A gurgling shower drain is often caused by a blockage in the pipes, which can lead to air bubbles forming and causing the gurgling sound. This blockage can be due to a buildup of hair, soap scum, or other debris in the pipes. It is important to address this issue promptly to prevent further damage to your plumbing system.
Are the shower and toilet blocked in your bathroom?
The steam from the shower acts as a decongestant which helps clear your sinuses out. Taking a hot shower is often recommended by the doctor when your sinuses or airways become clogged.
Stoppage
Standing in a hot shower can get rid of a clogged runny nose because of the steam, however, it does not last for a long period of time after the shower.
The gurgling sound in your shower drain may be caused by a blockage in the pipes, which can lead to air bubbles getting trapped and creating the noise. It could also be due to a venting issue in the plumbing system. It is recommended to have a plumber inspect and fix the problem to prevent any further issues.
if the drain is clogged up, then maybe
No unless you want to shower with your sewerage. The sewer line must be unblocked first.
Standing water in your shower is likely due to a clogged shower drain. When hair, soap scum, and other debris accumulate in the drain, water is unable to flow through properly, causing it to back up and collect in the shower. Regular cleaning and maintenance of the drain can help prevent this issue.