Have you tried a heating pad & tons of orajel

I have no idea how old your son is but I would give him a little bit of whiskey to swish around his mouth and swallow, should take the edge off the pain. Here is more: 1. Rinse your toothache away. Take a mouthful of water (at body temperature). If your toothache is caused by trapped food, a thorough rinse may dislodge the problem. 2. Floss gently if swishing with water doesn't work. You can try to remove popcorn hulls or tiny bits of meat from between the teeth by flossing. Don't forget to be gentle! because, your gums are likely to be sore. 3. Take a bit of whiskey to numb the pain. Hold a swig of whiskey over the painful tooth. Your gums will absorb some of the alcohol, this will numb the pain. Then spit the rest out. 4. Rinse with salty water after each meal and at bedtime. Stir 1 teaspoon of salt into a 8-ounce glass of water.Take a mouthful, rool it around in your mouth, then spit. 5. Try a hand massage. Rub an ice cube into the V-shaped area where the bones of the thumb and forefinger meet. Then gently push the ice over the area for 5-7 minutes. 6. Use oil of cloves. Clove oil is a nerve sedation that's been used for many years. Most drugstores carry tiny bottles of the oil. You can use it by placing a drop on a bit of cotton. Then pack it next to the ache. 7. Don't bite down. If your toothache is caused by a blow to a tooth try not to use that area when you eat. If nothing is damaged, take a rest for the tooth may restore its vitality. 8. Suck on some ice. Place ice on the aching tooth or the nearest cheek for 15-minute intervals at least three or four times a day. 9. Keep your mouth Shut. If air moving past the tooth is a problem, just shut off the flow. 10. Keep your mouth open. Some toothaches happen when a person's bite isn't quite right. In that case avoid shutting your mouth as much as possible until you see your dentist. 11. Swallow your aspirin. Do not place an aspirin directly on a aching gum. This can cause an aspirin burn. For pain relief, take an aspirin every 4 to 6 hours as required. 12. Stay cool. keep heat away from your aching cheek even if it makes the toothache feel better. If it is an infection, the heat will draw the infection to the outside of the jaw and make the infection worse.

Oil of cloves cotton budded around the painful area of tooth will give relief it will also make his tongue numb so try not to get it on it, you may have to repeat the application regularly, you can get it from the pharmacist, I always keep some in the cabinet just in case.

The emergency doctors should have an answer, if you bring your son there.

Oil of cloves sometimes works for numbing the pain inside your mouth. Rub some on the gums. I Know this will sound weird but check all over the ball of his foot, possibly near the base of his big toe where it connects and at the base and stem of his little toe. See if they are sensitive or painful. If they are rub those spots with the point of yur finger or an eraser, pressing more and more as you can till he doesn't feel as much pain. Do both feet. There are some reflexology points that are kind of hard to find for the throat and mouth. It's just a wild thought. I often work on my own feet and do find relief for all sorts of things. Another kind of strange one, though maybe not so strange since it is at least on the face, there are what are called Trigger points. Two for toothache are those jaw muscles between the mouth & ear and under the jaw. the other starts at the hairline about eye-level curving a bit to just over your ear. Some massage with your fingers to each of these muscles for 15 seconds or more will relieve your pain if they are causing it. Usually you will be able to tell right away just at the touch - you'll find that the muscle is tight & hurts when you didn't even realize they were! If it doesn't hurt you either didn't find the right spot or it's not bothering you. I know that when I find a spot, I REALLY find it, near jump out of my seat! lol! I hope one of these works for your son. I know the pain is just awful!

I would get him to the nearest emergency room and let them find a safe and effective solution.

2 words: emergency room

Im wondering if perhaps he has an abscess? usually when there is swelling thats the cause..i know my little boy had the same although he is only 4 and the best thing i gave him was anti inflammatory medicine as opposed to paracetamol. Try that and either a hot or cold flannel against the cheek area, until he can get to the dentist. Poor soul, give him a ((hug)) from me, toothache is the worst pain ever.