Brain fog; Tiredness; felt like whiplash coming from the back of the intestine to the front, felt like a rubber band snapped; felt like whiplash coming from the back of the intestine to the front, felt like a rubber band snapped; Unable to eat; It was a nerve/it is the nerves around the intestine; He lost 10 to 15 pounds; not bloating, it felt like he was going to explode a couple of times. The pressure was so bad he couldn't digest it; Lymph nodes were elevated; White blood cell count was elevated; Unable to sleep; Couldn't go to the bathroom; This is a spontaneous report from a contactable consumer (patient).   A 41-year-old male patient received BNT162b2 (PFIZER-BIONTECH COVID-19 VACCINE), via an unspecified route of administration, administered in the left arm, on 23Jul2021 at approximately 17:30, at the age of 41 years old, as 2nd single dose at 0.3 ml, for COVID-19 immunisation. There was no relevant medical history nor concomitant drugs to report. There were no vaccinations within 4 weeks of the BNT162b2 vaccination. The patient had received the 1st single dose at 0.3 ml of BNT162b2 on 02Jul2021 (lot number: EW098, number 59267-1000-01) in the left arm. On the third day, after the first dose of BNT162b2 on 02Jul2021, he felt like whiplash coming from the back of the intestine to the front. It felt like a rubber band snapped. After that, he was unable to eat or go to the bathroom, or sleep. His intestines are 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. He also had cramping, bloating, and constipation. Then, when he took the second dose of BNT162b2, he felt better, like 60 or 65 percent. At first, he didn't feel anything, was normal, just had the typical tiredness and the brain fog, was knocked out all weekend starting from 24Jul2021. However, it started acting up again within the third or fourth day. He started feeling his intestine doing the same thing and he couldn't even sleep. The second gastro doctor confirmed it and gave him something to try and alleviate it. It was dicyclomine, for 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 was like putting your hand, putting pressure with the fingers on the other hand, it felt like that on the intestine and it migrates. It felt like he couldn't go to the bathroom and it weakened his intestines, 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 is. He is not taking it. 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 is freaking out and is hoping it is not cancer. He did not have these symptoms before, was not on any medications. The first time felt like this, felt like his body had not been able to adjust, he is at 60 to 70%. Some days, he is at 70 percent and a couple of days have been 60 or 65 depending on how the pressure is. 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. He felt like in that month that he was going to die. He has never felt like that before. 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. Regarding the patient's weight, at the time of the reporting, he had lost 10 to 15 pounds. He was 210 or 211 right at the time of the reporting. The patient also confirmed white blood cells being elevated also after the second dose of BNT162b2. The patient had not recovered from the reported events.   The lot number for the vaccine BNT162B2 was not provided and will be requested during follow up.