It sounds like you are experiencing razor burn or mild irritation, which is very common and easily treatable. For immediate relief, you can apply a thin layer of over-the-counter hydrocortisone cream (1%) to reduce redness and swelling. Soothing topical agents like pure aloe vera or lotions with colloidal oatmeal can also calm the burning. If there is significant itching, an oral antihistamine such as cetirizine or loratadine can help. For pain, mild oral anti-inflammatories like ibuprofen are useful. Keep the area clean, wear loose clothing, and avoid shaving until the skin fully heals. If symptoms persist or worsen, please consult a doctor.