Dear friend You need to visit a good physio as you need it. Even tennis elbow brace is needed. Medicine will just give you temporary relief only.

u need a permanent solution for tht u also need to have a complete assesment , and try dry needing with in 1-2 session ur pain will reduce more then 70% also

Ointment used by you will only help in temperally pain relief. Only using ointment will not the complet treatment. It depends on sevearity level of tenis elbow that you need only physiotherapy or you need medicine and physiotherapy both. In physiotherapy dry nedling, resisted training, laser, mobilization, ultrasound like many more procedure available. Thease are tecnique will help you to cure. Consult to physio.

If its a diagnosed case of tennis elbow they need to be healed thlammedthen any gel/oil will give some temporary relief and a psychological diversion from pain for a short period of time as the muscles are stretched or inflammed and they need to be healed first and then strengthened.

Local application will give you temporary relief. You would need to take ortho plus physio treatment simultaneously. If the need be a local shot of hydrocortisone may be needed.

Tablets and superficial application of gel is not going to help at all cause the issue is mechanical. So you will need to get a detailed diagnosis of the issue ? It could be from the neck since the nerves come from the neck or local elbow problem or bad mechanics of sleeping sitting playing sports. Get a cervical xray and meet a physiotherapist who is specialising in manual therapy or mckenzie techniques. Also do ice fermentation  as soon as possible and as often as possible it will bring down the discomfort.

Don't play with your Elbow. Meet with Good Physio.