Your veterinarian must remove the lump, have it tested and then get back to you with the test results. Just removing the lump requires anesthesia and time handling the surgery. The time it takes depends on the location and size of the lump. This can cost upwards of $300 to $400 in cats and $400 to $500 in dogs.
Many cases of poison oak rashes lasted for 2 to 3 weeks depending on the gravity of the situation. The time it takes for the rashes to heal varies on the exposure of skin to the oil and any possible complications. If the rashes are more severe, then its healing period is expected to take longer. Such cases may last longer than 3 weeks. However, this healing period does not mean 2 or 3 weeks of insane itching.
However, it only takes 10 to 15 minutes for the urushiol to penetrate the skin and bond with cell membranes. Some people experience symptoms after as little as 30 minutes. Others may not have symptoms until 14 days following exposure. In typical cases, the reaction is most severe five days after the exposure. Mild cases of poison oak last from five to 12 days. Severe cases may last up to three weeks or longer. The rash often appears streaked and may develop into oozing blisters.