Hello Thanks for your query. I will try my best to provide you with best possible professional recommendations to your questions. I think due to the slap there is perforation in the tympanic membrane. Pain is the most common symptom of a perforated eardrum. It can range from general discomfort to immediate or intense pain, or the patient may just feel as if there is something not right with the ear. Other common symptoms are Vertigo (spinning sensation) ,Hearing change or loss ,Often with ringing, buzzing, or clicking Treatment depends on the size of the perforation if it is small, injuries heal on their own within two months, treatment may include analgesics to alleviate pain and antibiotics to prevent infection. If it is the case i advice you to keep the ear clean and dry while healing. Some large holes or non-healing small holes require surgery. In any case i advice you to see ENT specialist for examination, only after examination you can know the line of treatment. Yet again, I do hope that you have found something helpful and I will be glad to answer any further query. Regards