Thank you for your question. 

Due to the drought and unending heat we are currently experiencing many trees and plants are suffering in Harris county. This, in culmination with the fact that we had back to back freezes in winter have caused a lot of unseen damage to surface on these trees due to the immense stress they are under which can cause infection (tree lesions and oozing sap). With this situation the only thing we can do is wait and see if our plants survive and hope for some rain soon. Not even our native plants are safe from this heat/drought. If you are determined to save this tree I encourage you to reach out a certified ISA arborist on https://www.treesaregood.org/findanarborist and from there search by zip code or address to find an arborist near you;  they can give you thorough recommendations on what you can do for this tree moving forward.