cramping; bloating; constipation / unable to go to the bathroom; felt like whiplash coming from the back of the intestine to the front, felt like a rubber band snapped; His intestines acting up and are not functioning 100 percent; unable to eat or go to the bathroom, or sleep; unable to eat or go to the bathroom, or sleep; lymph nodes were elevated; white blood cell count was elevated; He lost 10 to 15 pounds; This is a spontaneous report from a contactable consumer (patient). A 41-years-old male patient received the first dose of BNT162B2 Pfizer-BioNTech COVID-19 mRNA Vaccine, administered at Pharmacy, via an unspecified route, in left arm on 02Jul2021 17:30, at 41 years of age, (Batch/Lot Number: EW098) at 0.3 ml single dose for COVID-19 immunization. Medical history was none. The patient didn't receive any concomitant medication. He didn't receive any other vaccination in the 4 weeks prior to COVID-19 vaccine. On the third day after the first vaccine, on a Sunday (04Jul2021), he started experiencing cramping, bloating, constipation and it was then that he felt like whiplash coming from the back of the intestine to the front. It felt like a rubber band snapped. He thought it was from sitting down for an hour or 2 and needed to get up. After that, the whole month of Jul2021 was horrific: he was unable to eat or go to the bathroom, or sleep. His intestines were not functioning 100 percent. He went to urgent care several times and they did a CAT scan and found that his lymph nodes were elevated. His white blood cell count was elevated, which was attributed to the vaccine. He kept going. The first gastro doctor said it was probably "the virus" and it kept happening. The second gastro doctor confirmed it and gave him something to try and alleviate it. It was dicyclomine 20 mg tablets, for Irritable bowel syndrome (IBS), trying to alleviate the intestine from what felt like not bloating. It felt like he was going to explode a couple of times. The pressure was so bad he couldn't digest it and used it the first time but it made it worse. It felt like he couldn't go to the bathroom and it weakened his intestines, he held off a couple of days and was able to sleep. Doctor told him to try and use it once a day and see how it was. He was not taking it. Clarified that the dicyclomine relaxed the intestine. Also ran all the tests that patients with similar symptoms had and found nothing. Said that it was a nerve. He hasn't been feeling better and has been a whole month. He had the incidents with the vaccine and he just had a liquid diet and fruits, like berries and drinking a lot of tea and prune juice. Apple cider did help him go to the bathroom the first week. Then, he couldn't go to the bathroom and still has not been able to get regular. He was freaking out and was hoping it was not cancer. He did not have these symptoms before, was not on any medications. The first time he felt like this, felt like his body had not been able to adjust, he was at 60 to 70 %. Some days, he was at 70% and a couple of days have been 60 or 65 depending on how the pressure was. Sometimes he feels it in his intestines and will go on throughout the night. He has been to the doctor's a couple of times and to urgent care every week. It felt like in emergency care. They did a CAT scan and ultra sounds to make sure he didn't have any blood clots in his organs. Those came out negative. The doctor believes it is the nerves around the intestine. They had someone else who had recovered after 3 months and some after 6 months still dealing with this. He is scared not sure what to, he wanted to check on what was going on. He felt like in that month that he was going to die. He has never felt like that before. At the time, his weight was a little more. He lost 10 to 15 pounds. He is 210 or 211 right now. It was bad for 2 weeks. It had started Sunday and was really bad. he was holding on to it all week. He hadn't gone to the doctor yet, thinking it was probably something he ate. Thought it maybe just brief side effects. Thur or Fri he went to urgent care, that first week he couldn't bare it. The second week, he continued and kept going to different doctors who ended up recommending the gastro doctor, they were stumped. He could feel it all around his intestines. Based on the blood work, the first gastro doctor told him to take ibuprofen (ADVIL) 200 mg as pain reliever, as the only thing was the white blood cells being elevated, and did not think it was necessarily an infection and it had barely decreased it. He was weak and could not stand he had so much pressure, had to kneel. Felt like someone was tugging at it. He took ADVIL (Lot# : R79367, Expiry Date: Apr2022), regular dose of 2 pills, and it felt worse and felt like the intestine was about to explode. It had so much pressure on it but calmed down when he had some tea. It brought it down so he  went to get an ultra sound. He also took Solubilized ibuprofen 200 mg/diphenhydramine HCI 25 mg, 80 liquid filled capsules in bottle. He asked the second doctor because he was worried. The first month, he thought he was going to die, it felt so horrible and he couldn't even get out of bed. He was  laying in bed huddled up. He went to urgent care. At night it relaxed and the next day went to urgent care and had an ultra sound. He was still feeling some pressure. It was ongoing. It was deceiving, he would feel better then, right now, he feels like something is on his intestine. He does not know what it is. As far as nerves, he feels like it is healing and getting kind of normal, still weird, but normal. He is not really eating. Every time he would eat he would have to go to the bathroom. Something triggers it and starts the tugging again. He feels it in the back, probably the colon. It felt like tugging the first 2 weeks, was terrible, like it was actually pulling the intestine side to side. The second gastro doctor said it was probably a nerve. It still feels like it does go away, almost like an ongoing thing. In a couple of days, he feels better and almost really has a strict liquid diet. He is still trying to eat fiber but no too much. He will feel better and feels like almost healing then, it starts up again. It is like it is ongoing. The doctor put him on the IBS diet and for the most part has been following it. He still does not feel normal. At the time of the report the events "felt like whiplash coming from the back of the intestine to the front, felt like a rubber band snapped", "his intestines acting up and are not functioning 100 percent", "cramping", "bloating" and "constipation" had not resolved yet; the outcome of all the other events was unknown.