Itchy forearm causes: 1, mosquito bites forearms have red bumps and itchy, with anemone or cool oil rub the affected area has the effect of stopping the itch, 3-7 days after being bitten by the bumps can gradually subside. 2, forearms in contact with some kind of thing, the appearance of small bumps of rice grain and itching symptoms, consider allergies caused by the first use of water to clean the local, local rubbing peppermint glycerine lotion, oral parsley to stop the itching.3, In summer, after the beach or outdoor activities, the forearms appear and normal skin color close to the small bumps, and with itching symptoms consider sun allergy dermatitis, land ned ointment to rub the affected area, go out wearing sunscreen clothing to help the recovery of the condition. 4, the affected area has a large number of pimples and wind, mainly itching, after a few hours after the pimples subside, itching disappears, but it will be recurring, consider urticaria oral loratadine tablets for treatment. If you have any questions, please feel free to contact us.