Brief Answer:
sorry, clin pharmacologist...

Detailed Answer:
so, I'm gong to HAVE to mention drugs. Signs of bowel motility issues would include, not normal bowel movements, spasm pain, bloating. Happens due to scar tissue (I'm sure everyone has mentioned this).
Surgical treatment and changing the mesh is really fraught. There has to be healing after surgery and then there is the LIKELIHOOD of new scar.
Then there is the treatment of the bowel contents to make them move easier and with less being caught up and involved in spasm. Stool bulk and softening and increasing liquid content of stool (people REally should have mentioned this).
Then, here's what I can add. First, narcotics are a bad idea. They literally put the bowel to sleep and can only make bowel movement worse. People who have narcotic complications on bowel recently had a few new drugs approved in the US that are narcotic blockers that only work inside of the gut and are designed to stop narcotics locking up gut motility. Haven't had anyone who needed it yet, so I cannot say if this drug works at all.
THen....... main thing..... there's a lot of non-narcotic drugs for gut motility. A Lot.
1) bentyl. Lowers gut movement and lowers spasm
2) reglan INCREASES gut movement and has the gut movement pattern change generally to a more normal one.
3) amitryptiline should really be number one. It is an anti-depressant. That is the only property of the drug that is irrelevant! It has side effects of shutting down the gut. This includes a dry mouth but also includes lowering gut motility (atropine like effect). This occurs about 10 min after taking. Not it's main benefit. It is a serotonin modulator to be an anti-depressant. The serotonin also triggers a LOT of the gut problems. having a SMALL amount of amitryptiline (10-20 mg) given frequently (3 times a day) causes a slight elevation of serotonin in the gut alll the time. Normal gut has ups and downs of serotonin like gentle waves. Irritable bowel is like heavy wave chop. Amitryptiline increases the level of serotonin all the time so that the lows of the waves are gone. This changes the chop to gentle waves cause the lows are as high as the peaks in serotonin levels due to the amitryptiline. Takes a few days at most a week.
Did I mention it is a non-narcotic pain drug? yeah...that leads to
4) non-narcotic pain drugs that damp down twitchy nerves. Amitryptiline might be the best. There's a lot of other very cheap very safe drugs that also do that but in different ways than amitryptiline. Any anti-epileptic, but gabapentin is the most commonly used, easiest to use, and would be the safest except for this indication all the other anti-epileptics can be used and half to one quarter the dose used in epilepsy so they are all quite safe at those doses.
and last on the list is
5) this is really last on the list and I cannot really recommend this BUT, for the sake of completeness I have to include it. Capsaicin is hot chili extract. It stimulates pain nerves and changes gut motility based on its action on those nerves. It is painful. It activates and kills off pain nerves. This will have an effect BUT, in the short term likely to be quite painful and this is not even studied to say if it works or that it isn't just harmful and......also not recommended....
6) other stimulants of pain. What? Other stimulants of pain?!? Yeah, this is fairly well established that in some people with continuing to trigger pain, the body down regulates the pain (wind down, habituation, tolerance) but it can move in the other direction too. Part of the effect is on the pain nerves that wear out with over stimulation. Part of it is changes in the spine that damp down signals when there is an overload (amitryptiline does this and DOES NOT cause pain so.......well, I put it higher on the list for a reason). And part of it is at the level of the brain which tunes out pain after it is present all the time... yeah...well.... cognitive exercises can theoretically be done to do the same thing, like meditation and mindfullness. None of these techniques are established as working so,

I can only recommend the advise you've likely already gotten and various stool softeners and nerve pills. Likely to help, very unlikely to do anything at all bad.

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